update target platform to 4.1.5.Beta1-SNAPSHOT
JBIDE-10219 Migrate org.eclipse.core.runtime.contentTypes extension points to org.eclipse.core.contenttype.contentTypes
JBIDE-11319: Url for Eclipse-SourceReferences
remove .project, .classpath and .cvsignore
ignore .settings, .project and .classpath
delete remaining .classpath, .project and .settings/
fix import existing maven project problem
remove different warnings
remove bin/ from Bundle-ClassPath
set Bundle-RequiredExecutionEnvironment to JavaSE-1.6
bump version numbers to 4.6.0