Handle more plugin header file formats

Fix #13

Signed-off-by: Sudar <sudar@sudarmuthu.com>
Add the update version script
Add more fields to the meta list
Add `readme.txt` to zip file that is created
fix history file switch
Merge pull request #15 from nextgenthemes/patch-1

fix history file switch
Search only the root directory for `README` file

Fix #16
Update Todo list

See #17
Merge remote-tracking branch 'upstream/master'