Added option to convert code, file or directory.
Added tests for the updated main method
Merge branch 'ArgumentsToMain' of https://github.com/Wampie/kj2k

Conflicts:
	src/org/jetbrains/jet/j2k/JavaToKotlinTranslator.java
	tests/test/org/jetbrains/jet/j2k/KJ2KArgsTest.java