Implement conditional style application for link depending on their attributes
the configuration is done using preferences page
the predicate editor is used to define conditions to access it use ReqCycle menu
Merge branch 'master' of https://github.com/aradouan/ReqCycle
Some compilation errors with previous commit.
Error management in the OCL connector.
Merge branch 'master' of https://github.com/aradouan/ReqCycle.git

Conflicts:
	plugins/org.eclipse.reqcycle.ocl/META-INF/MANIFEST.MF
Added the ocl traceability plugin. 

Copyrights and licences.
Merge branch 'master' of https://github.com/aradouan/ReqCycle into PredicateDev
pull and merge with Master
Merge branch 'PredicateDev' of https://github.com/aradouan/ReqCycle into PredicateDev
Predicates bug fix and refactoring