Patch to improve IDE performance - avoid recalculating dependencies if no requirements or capabilities have changed (FELIX-2164)

Also as part of this patch have generalised the req/cap model with the addition of IRequirementModelElement and ICapabilityModelElement interfaces

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@918577 13f79535-47bb-0310-9956-ffa450edef68
20 files changed