Check validity of features.
Added some useful information concerning the autoupdate tool of the correlator
Added LD_LIBRARY_PATH for CUDA.
Merge remote-tracking branch 'kszuttor/patch-2'
Merge branch 'master' of github.com:espressomd/espresso
added Poiseuille test script and fixed a typo
small cleanup of Poiseuille.tcl script
dumb mistake I meant to fix with the last commit
Fix CUDA on Mac OS X. Fix CUDA in conjunction with mpifake.

nvcc on OS X compiles 32-bit binaries even on 64-bit systems. So check whether we're compiling for 64-bit Macs and set -m64 accordingly.

Use -I./mpifake instead of -I/usr/include/mpi in nvcc flags if compiling with mpifake.
Updated prepare_vmd_connection to allow to ignore charges
Also, use that in the samples
MPIEXEC no longer needs to be given with absolute path
Added temperature unit discussion
Updated ax_count_cpus from autoconf library.
Some more fixes for C++.
Merge branch 'master' into cpp
inline is part of the C++ standard since the beginning, no need to test
for it.
Merge branch 'features' into cpp
Merge pull request #108 from mkuron/configure-osx

Fix CUDA on Mac OS X. Fix CUDA in conjunction with mpifake.
Merge remote-tracking branch 'origin/master' into cpp

Conflicts:
	configure.ac