Update README.md

No Need of this. Because 4.2.2 is out and this confuse people.
Merge pull request #151 from djahmednawaz/patch-1

Update README.md
update gradle plugin to 0.12
Merge pull request #172 from mutahirqureshi/gradle-plugin-0.12

update gradle plugin to 0.12
Merge branch 'master' of https://github.com/yixia/VitamioBundle

# By djahmednawaz (1) and mqureshi (1)
# Via Crossle Song (2) and mqureshi (1)
* 'master' of https://github.com/yixia/VitamioBundle:
  update gradle plugin to 0.12
  Update README.md