temp commit
refactoring, work in progress
Temp commit. MStruct added.
Configuring release plugin
Removed unneeded mock for attach API
work in progress
Forgotten local changes
Merge branch 'sandbox' of https://github.com/aragozin/jvm-tools into
sandbox

Conflicts:
	attach-api/pom.xml
	core/pom.xml
work inprogress
Major refactoring
- modular command architecture
- switch to use jvm-attach-api to wrap attach stuff
- JCommander for arg parsing
Added heap histogram command
Added license headers
Dropped some garbage
Code clean up. Module refactoring. MXDump as separate module.