Added support for the flag /directory to search for assembly dependencies in the given directory. Related to SONARFXCOP-9.
Merge remote-tracking branch 'kashingl/FxCop-plugin-support-for-directory-to-search-assembly-dependencies' into MyDevelopmentBranch

Conflicts:
	src/test/java/org/sonar/plugins/fxcop/FxCopRuleRepositoryTest.java