Fix rebase only to also perform force push

1.0.11.0

Made the rebase only also perform a force push if appropriately

Fixed exception

1. When squashing without rebase/push selected it was showing a error
2. Now removing invalid text when doing stuff.

1.0.0.8

Now only keeping instance of lib2gitsharp around when needed. Using VS version
Other minor changes

1.0.0.7

Now supports cancellation token
Continue now works.

1.0.0.6

Initial release of the squash visual studio extension