clean up and enhance documenting folders.

[thulasi-ram]

1. A version bump has to be changed at many places. To make a script/checklist for this.

• Change in setup

• Change in docs/conf.py

• Change in git tag

2. Remove dependency on wiki. I was fond of wiki but it was not supporting advanced features. The current doc structure is an effort to make docs work in both wiki and sphinx. After much time spent on this the realization is to stop supporting wiki as it is effort duplicated. Hence the docs should attain a more understandable format.