Initial steps at supporting placing breakpoints in JAR libraries
Merge branch 'Java_Breakpoints_2' of https://github.com/ivmarkov/sdbg into Java_Breakpoints_2

Conflicts:
	com.github.sdbg.debug.core/src/com/github/sdbg/debug/core/ISourceLookupExtensions.java
	com.github.sdbg.debug.core/src/com/github/sdbg/debug/core/internal/jdt/JDTSourceLookupExtensions.java
	com.github.sdbg.debug.core/src/com/github/sdbg/debug/core/internal/source/SDBGSourceLookupDirector.java

Signed-off-by: ivmarkov <ivan.markov@gmail.com>