Created annotation interface for integration tests.

To simplify testing, we've added an IntegrationTest interface
that may be used in conjunction with the JUnit4 Category test
runner to segment which tests are run during which part of
your build.
Created annotation interface for unit tests.

To simplify testing, we've added an UnitTest interface
that may be used in conjunction with the JUnit4 Category test
runner to segment which tests are run during which part of
your build.
Added jersey2-toolkit.version property

Added a new configuration property named jersey2-toolkit.version which
will always be set to the current version of the jersey2-toolkit
library.
Removed dependency locations from build.

Build speed optimization.
Updated version of github plugin.

See https://github.com/github/maven-plugins/issues/69