Merge pull request #1 from mwanji/master

A few small improvements
Merge pull request #6 from mwanji/master

Improved error reporting and version ordering
Merge pull request #7 from mwanji/master

Update dependency if different version of existing dependency is installed
Added shell scripts.
Merge pull request #10 from mwanji/shell_script

Added shell scripts.
[maven-release-plugin] prepare release webjars-maven-plugin-0.1.0
[maven-release-plugin] prepare for next development iteration