Add git flow info to contribution guideline
Fix typo in an example
Improve readme
Fix another example in readme
Add the proxy class and rethink the operators
Reflect changes in readme
Improve contribution
Fix table in readme
Add referencing info
Another typo in the readme
Add version constants and bump to 0.2.0
Merge branch 'release/0.2.0'

* release/0.2.0:
  Add version constants and bump to 0.2.0
  Another typo in the readme
  Add referencing info
  Fix table in readme
  Improve contribution
  Reflect changes in readme
  Add the proxy class and rethink the operators
  Fix another example in readme
  Improve readme
  Fix typo in an example
  Add git flow info to contribution guideline