No longer require to specify source files.
[maven-release-plugin] prepare release frege-maven-plugin-1.0.4
[maven-release-plugin] prepare for next development iteration
Merge branch 'release/1.0.4'

* release/1.0.4:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release frege-maven-plugin-1.0.4
  No longer require to specify source files.
Merge tag '1.0.4' into develop

Rel

* tag '1.0.4':
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release frege-maven-plugin-1.0.4