Redesign cmake

Tune the makefile according to new principles, which adds a few bells
and whistles and for clarity.

Synopsis:

* The dependency on opm-common is completely gone. This is reflected in
  travis and appveyor as well. No non-kitware cmake modules are used.
* Directories are flattened, quite a bit - source code is located in the
  lib/ directory if it belongs to opm-parser, and external/ if third
  party.
* The sibling build feature is implemented through cmake's
  export(PACKAGE) rather than implicitly looking through source files.
* Targets explicitly set required public and private include
  directories, compile options and definitions, which cmake will handle
  and propagate
* opm-parser-config.cmake for downstream users is now provided.
* Dependencies are set up using targets. In the future, when cmake 3.x+
  can be used, these should be either targets from newer Find modules,
  or interface libraries.
* Fewer system specific assumptions are coded in, instead we assume
  cmake or users set up system specific details.
* All module wide configuration and looking up libraries is handled in
  the root makefile - all sub directories only set up libraries and
  compile options for the module in question.
* Targets are defined and links handled transitively because cmake now
  is told about them. ${module_LIBRARIES} variables are gone.

This is largely guided by the principles outlined in
https://rix0r.nl/blog/2015/08/13/cmake-guide/

Most source files are just moved - if they have some content change then
it's nothing more than include fixes or similar in order to make them
compile.

tests/parser/EventTests.cpp

@@ -0,0 +1,74 @@
+/*
+  Copyright 2013 Statoil ASA.
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  OPM is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdexcept>
+#include <iostream>
+#include <boost/filesystem.hpp>
+
+#define BOOST_TEST_MODULE EventTests
+#include <boost/test/unit_test.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+#include <opm/parser/eclipse/EclipseState/Schedule/TimeMap.hpp>
+#include <opm/parser/eclipse/EclipseState/Schedule/Events.hpp>
+
+BOOST_AUTO_TEST_CASE(CreateEmpty) {
+    boost::gregorian::date startDate( 2010 , boost::gregorian::Jan , 1);
+    Opm::TimeMap timeMap{boost::posix_time::ptime(startDate)};
+    Opm::DynamicVector<double> vector(timeMap , 9.99);
+
+    for (size_t i = 0; i < 11; i++)
+        timeMap.addTStep( boost::posix_time::hours( (i+1) * 24 ));
+
+    Opm::Events events( timeMap );
+
+    BOOST_CHECK_EQUAL( false , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 10));
+
+    events.addEvent( Opm::ScheduleEvents::NEW_WELL ,  0  );
+    BOOST_CHECK_EQUAL( true  , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 0));
+
+    events.addEvent( Opm::ScheduleEvents::NEW_WELL , 10 );
+    BOOST_CHECK_EQUAL( false , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 9));
+    BOOST_CHECK_EQUAL( true  , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 10));
+    BOOST_CHECK_EQUAL( false , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 11));
+
+    events.addEvent( Opm::ScheduleEvents::NEW_WELL , 10 );
+    BOOST_CHECK_EQUAL( false , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 9));
+    BOOST_CHECK_EQUAL( true  , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 10));
+    BOOST_CHECK_EQUAL( false , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 11));
+
+    events.addEvent( Opm::ScheduleEvents::WELL_STATUS_CHANGE ,  9 );
+    events.addEvent( Opm::ScheduleEvents::WELL_STATUS_CHANGE , 10 );
+    BOOST_CHECK_EQUAL( false , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 9));
+    BOOST_CHECK_EQUAL( true  , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 10));
+    BOOST_CHECK_EQUAL( false , events.hasEvent(Opm::ScheduleEvents::NEW_WELL , 11));
+    BOOST_CHECK_EQUAL( true  , events.hasEvent(Opm::ScheduleEvents::WELL_STATUS_CHANGE , 9));
+    BOOST_CHECK_EQUAL( true  , events.hasEvent(Opm::ScheduleEvents::WELL_STATUS_CHANGE , 10));
+}
+
+
+BOOST_AUTO_TEST_CASE(TestMultiple) {
+    boost::gregorian::date startDate( 2010 , boost::gregorian::Jan , 1);
+    Opm::TimeMap timeMap{boost::posix_time::ptime(startDate)};
+    Opm::DynamicVector<double> vector(timeMap , 9.99);
+    Opm::Events events( timeMap );
+
+    events.addEvent( Opm::ScheduleEvents::NEW_WELL , 0 );
+    BOOST_CHECK( events.hasEvent( Opm::ScheduleEvents::NEW_WELL | Opm::ScheduleEvents::NEW_GROUP , 0 ));
+}