ERT-815: Added optional arguments to Boundingbox2D()
ERT-815: Removed unused function
ERT-815: Exported Python check for Fortran format
ERT-815: Added vector method elementSum()
ERT-815: Added EclFileContext to support with openEclFile() as f:
ERT-815: Added getDataPtr() to xxxVector classes.
ERT-815: Added new EclGrid.loadFromGrdecl() constructor.
ERT-815: Renamed EclGrid.create_rectangular
Added .so extension for normal dlopen()
Changed algorithm for locating shared libraries:

 - ert/__init__.py will try to import a module __ert_lib_path which
   should contain information of where the libraries are located.

 - The ert/__ert_lib_path module is created from cmake using
   configure_file(); one is created for the build directory and
   another for the installed directory.
Made PYTHON_INSTALL_PREFIX a cmake user variable.
Removed job_queue dependency
Using lib/pythonX.Y/site-packages as default python prefix
ERT-815: Updated basecclass.__eq__()
ERT-815: Added installAbortsignals() to ExtendedTestCase
ERT-815: Size protection vector_<T>_select_unique
ERT-815: Added missing header
ERT-815: Renamed test_ecl_grid -> test_ecl_grid_statoil
ERT-815: Added new test class for Grid
ERT-815: Changed ValueError -> IOError in xyz_io