Conflicts:
	GeoLib/Point.h

[DataExplorer] automatically load a file given as a command line argument

for version information. Dummy version 6.6.6 is set.

Update more copyright years to 2012-2015.

Updated copyright year to 2015

PETSc corrections

Cleanup

Conflicts:
	Tests/GeoLib/TestBoundingSphere.cpp

OGS version information is now handled by its git tag

When the current commit is also a tag then the version is the tag name,
e.g. "6.0.1". When the current commit is not a tag then the ogs version
is the last tag + number of commits since then + current commit short
hash, e.g. "6.0.1-140-g80ac475".

This info is available in BaseLib::BuildInfo::git_describe. Use it to
uniquely set the OGS version.

Better installers and redistributables

Package OpenMP library as well. This works since CMake 3.1. Set some CMake deprecation policies.

MinGW support

- Enabled Zip packaging on Mac OS.