Adds doc and simplifies #modifies?.
Adds compatible? to modifier and doc.
Adds auto naming of actions if not specified.
Adds unsided to predicate.
Adds expand_premisses! to rule.
Adds cross premisses to helpers.
Fixes some leftovers.
Updates doc.
Updates doc.
WIP add transition building.
WIP transitions
Public and actions working.
Simplifies specs.
RewardBuilder to optimize.
Merge branch 'transitions' of github.com:EHadoux/arg2momdp into transitions

Conflicts:
	lib/arg2momdp.rb
	lib/arg2momdp/objects/pomdpx/xmlbuilder/transitionbuilder.rb
	lib/arg2momdp/objects/pomdpx/xmlbuilder/xmlhelper.rb
	lib/arg2momdp/xmlbuilder.rb
	spec/integration_spec.rb