* Removed method getDims since getNXYZ already exists
* Now we throw if EclipseGrid get lean deck
* Removed tests for assertCellInfo and hasCellInfo
* Fixed ResinsightTests to use GridDims
* Added a test to ensure DIMENS/SPECGRID are handled consistently
* Added GridDims.cpp source file and moved code from header
* Added GridDims.(c|h)pp to CMakeLists
* Removed use of MessageContainer in GridDims, updated calls
* Made function getDims(keyword) inline readDims
* Reformatted GridDimens