* Add version_added: 1.0.0 for all new features added before pre-ansible-base.
* Add version_added: 1.0.0 for all new features.
* Next release will be 0.2.0
* Fix error.
* Remove unnecessary warnings.
* add a new module iso_create
* add elements in argument spec
* remove changelog for new module
* change the path of test file
* comment out pip check task in test case
* comment out install pip in test case
* move pip install task and add skip python2.6
