added tutorial on object-in-fluid module
Added copy-constructible class for vectors of fixed length to substitute Eigen::Vector3d.
Updated makefile.
Merge remote-tracking branch 'espresso-clean/vector'
New myconfig handling.
Added operator[] to vector class.
Added SystemInterface definition.
Throuw background error when running with virtual sites and having non-consecutive particle numbering
Change warning to error in part n vs_auto_relate_to
Mentioned the pressure contribution for vs_relative and the need for consecutive particle numbering when using vs in the manual.
Merge pull request #129 from ohickey/working_branch

Working branch
Added hasFeature() and null iterators to abstract interface definition.
Added generic cuda memcopy functions.
Added access to particle charge in the python interface
Only compile python iface to debye hueckel, if ELECTROSTATICS is on
Fix Virtual sites test case
Merge branch 'master' of git://github.com/espressomd/espresso

Conflicts:
	NEWS
Added warning to myconfig-default.hpp
Finished GPU part of interface.
Added velocities to GPU interface.