Conflicts:
	examples/test.c

Io fixes

That fixes some issues #52 that appeared on the BlueGene when reading more than 1>>32 particles in parallel or serial mode.

I have also modified the uniform box script to be much faster and lightweight. 

See merge request !48

Ensure GIT_BRANCH non-empty when not on a branch

If HEAD is detached e.g. during `git bisect`, GIT_BRANCH ends up empty, which causes an error at runtime. This change grabs the description from `git branch`, which is either the branch name or something like `(HEAD detached at <hash>)` on recent versions or `(no branch)` in older versions. Works with BSD and GNU sed, and git >= 1.0.0b (at least) although detached HEAD only introduced in 1.5.0.

See merge request !47

By default the code does not dump the task graph any more. This is dumped only hen the option '-y' is passed to the command line.

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