Added RevTag to text serialization factory
fixed issue in format-patch command, which checked for wrong number of params
Improved show command

- It now accepts multiple paths
- It includes attribute type information when using the --raw command
fixed merge operation. It required commit when aborting, which is not actually needed
Fixed resetOp, so it removes conflict, even if reseting to a version identical to the current one
Fixed exit codes. It was swallowing them and not returning them correctly
Fixed NPE when printing an attribute diff with null value

Fixes #490
Fixed issue with false conflicts being signaled when both branches had made exactly the same change

Fixes #507

Includes some code cleaning
Allow the blame operation to run during conflicts
Update README to reflect current version
Update download link to current version
Merge pull request #506 from volaya/diff_exception

Fixed NPE when printing an attribute diff with null value
Merge pull request #503 from volaya/reset_conflict

Fixed resetOp, when used during conflict
Merge pull request #500 from volaya/show_improvements

Improved show command
Merge pull request #497 from volaya/tags

Added RevTag to text serialization factory
Merge pull request #501 from volaya/merge-abort

fixed merge operation. It required commit when aborting.
Merge pull request #512 from volaya/blame_conflict

Allow the blame operation to run during conflicts
Merge pull request #504 from volaya/exit_code

Fixed exit codes. It was swallowing them and not returning them correctly
Merge pull request #498 from volaya/format-patch

fixed issue in format-patch command
Add concurrent tests for graphdatabases