Merge tag 'v0.2.0'

v0.2.0 Release
DEV-44 | release v0.2.0: update the next version
DEV-45 | automatic docs tag deployment
DEV-20 | fix release_process.rst format, add release requirement for tag ready step and UTC as standard reference time
DEV-47 | review and update docs
DEV-47 | review and update docs: update django_training.rst
DEV-54 | Change commit message
DEV-54 | Switch branch
DEV-54 | Add some notice
 Dev 54 | Add recommended version & some change follow comments
DEV-54 | Update more on guide
DEV-54 | Change pls -> please
DEV-6 | Change guide and enable ssh forward agent
DEV-54 | upgrade vagarant and virtualbox support: update installation scripts for Ubuntu 12.04
DEV-6 | update docs for ssh forward agent
DEV-49 | Support NodeJs in Dev
DEV-49 | Change some text
DEV-7 | Divide to external config
DEV-7 | Remove unknown characters
DEV-7 | Add custom config to .gitignore and change code in Vagrant