Fixed the problem with release notes automation.

The release notes were not committed correctly. [ci skip]
Documented minimum JUnit requirement for MockitoJUnitRule

Fixes #96
Improved the javadoc, small refactoring.
Fixed failing test.
Fixed some problems with release automation.
Increment version '1.10.6' -> '1.10.7' by Travis CI build 275 [ci skip]
"Update release notes by Travis CI build 275 [ci skip]"
Merge branch 'master' of https://github.com/mockito/mockito