added aspect id to variable entity
added interface methods to stop watch and clear watch variables
introduced watchlist object via json schema and code generation
addWatchLists throws Geppetto execution exception if something goes
wrong
Added visitor to serialize tree + tests
added some comments
minor chages - dashed is json property names are evil
Merge branch 'variable-watch' into development
Fixed treeSerialization, refactored subtrees and created enum. Factored
out common watch implementation into ASimulator.
Adding travis for continuum building
updater ISolver interface with watch methods
utility to serialize variable paths + test
Add methods for getting and setting scripts of simulation
Merge pull request #14 from openworm/master

Master to development
Release 0.0.8
Merge branch 'development' of https://github.com/openworm/org.geppetto.core.git into development
Merge pull request #15 from openworm/development

Release 0.0.8