Update md files. Add cpp in docs/examples (#1769)

* Update md files. Add cpp in docs/examples

* Normalize all the line endings

* Fix block_id in snippets

* Fix utf-8 encoding

* Add new folder for snippets

* Fix issues with compiling code from snippets

* Added conteiner iterator fix

docs/snippets/InferenceEngine_QueryAPI0.cpp

@@ -0,0 +1,10 @@
+#include <inference_engine.hpp>
+
+int main() {
+using namespace InferenceEngine;
+//! [part0]
+InferenceEngine::Core core;
+std::vector<std::string> availableDevices = core.GetAvailableDevices();
+//! [part0]
+return 0;
+}