[refactor] use ServiceLoader and Lookup.getDefault() for providing the Strategies
add apache 2 license information
[refactor] organise imports
add apache 2 license information
remove obsolete comment
update description
[fix] update pattern of GoogleCodeStrategy - support username
remove comment
[doc] add sample screenshot
[release] update to 1.2 because there were some internal releases before
[project] update code base name
[project] sign the plugin