Interfaces update
Propagating refactoring
Merge remote-tracking branch 'origin/development' into replay
Ongoing refactoring
Advance timestep
Factored out some functions to ASimulator
Merge pull request #15 from openworm/replay

Merging replay branch
Units support - not done yet
Releasing 0.1.2
Merge remote-tracking branch 'origin/units' into development
Progress with hooking up units. Need to figure out how to use JScience
to transform the product of SI base units into derived SI units.
Merge pull request #16 from openworm/development

Release 0.1.2