Kotlin container added.

Container entries could be added only if it doesn't exist.

Minor: refactoring

Conflicts:
	kotlin-eclipse-core/plugin.xml
	kotlin-eclipse-test-framework/src/org/jetbrains/kotlin/testframework/utils/TestJavaProject.java
ProjectUtils class refactoring.

Minor: java code conventions, refactoring
kotlin_bin folder path in classpath is now not absolute.
Linux launch fix.
Minor: java code conventions