Fixed Warnings
fixed doxygen warnings in lj_tcl.h and lbgpu.cu
Fixed compiler warnings for config-nofftw and config-debug. Replaced strange *(int *)0=0; core dump with abort();
Merge branch 'master' of kuri:/home/shervin/espresso
Merge branch 'master' of git://github.com/espressomd/espresso
Merge branch 'master' of kuri:/home/minina/espressomd
Merge pull request #81 from fahrenberger/master

More fixes for doxygen warnings and some GCC warnings.