Blue gene HDF5 i/o fixes

This fixes the i/o bug #53 on the blueGene and adds a unitary test reading in a fresh hdf5 input.

See merge request !46

Get basename of branch without --short option, this requires a git > 1.7.10

Don't use --short in symbolic-ref. 

See merge request !45

Make sure there is always a non-empty compiler name or compiler version

This fixes a bug reported by Heinrich. When the compiler string is empty, the HDF5 i/o fails as you cannot write an empty string as an attribute. 
This fix makes sure the compiler name and version is always a non-empty string.

See merge request !44

New command line parameter for scaling tests

Following a request from Heinrich, I added a command-line parameter '-o' that stops the code writing output files. Useful for scaling tests where we don't want to generate tons of data output.



See merge request !43

Added a command-line parameter '-o' that stops the code from writing output files. Useful for scaling tests.

Added a line of output dumping the number of particles in the ICs

See the closed #39 for some discussion

See merge request !42

Added a simple unit test example.

Test can be run using 'make check' and new tests are added by editing tests/Makefile.am

This is just to have an example unit test.


See merge request !41

Former-commit-id: 0df8cff51669ec74e18a7c33091db203a445780b

Former-commit-id: b418880e46e505b1f06567d7cbc67578448a3e11

BlueGene fixes

Small changes to the code to compile and run on a BlueGene architecture with the XLC compiler.

See merge request !38

Former-commit-id: cc09b03f8b94b09d234c5ba9feb95e733de2f344

Added a simple unit test example. Test can be run using 'make check' and new tests are added by editing tests/Makefile.am


Former-commit-id: 40f040fbc4575da0d40f3bb3968bd988351499e6

Former-commit-id: 140fe34a00932e5ffff05252fdfc3acebf2b0dba

Former-commit-id: 32011ab44a2db3b092d96810d82273b7f3aedd5e

Former-commit-id: df41792bcaf5ab41cf34551b6567da506c524db5

Former-commit-id: 9fc47e975df65702410bb3d75e830e140b0f68dd