Added "require_cudadevice" to testcases. Make configure check whether a device is available.
Fixed the options for dependency generation with nvcci.
iFixed options.
fixing some warnings
Small fixes.
Merge pull request #183 from HRZaheri/master

fixing some warnings
Added quartic bonded interaction.
Merge branch 'master' into cgdna

Conflicts:
	src/core/constraint.cpp
	src/core/forces_inline.hpp
	src/core/interaction_data.hpp
More documentation.
Fixed background error collection.
No background errors in tcl.
Fixes
cg_dna: Fixed reference potential for twist stack interaction.
New bond coulomb interaction.
Merge branch 'master' into cgdna

Conflicts:
	src/core/forces_inline.hpp
Corrected cdh print command.
Fixed scaling error in cg_basepair interaction.
...
Fixed Coulomb-Debye-Hueckel IA