Merge branch 'release/0.6.16'
Merge branch 'release/0.6.17'
Merge branch 'release/0.6.18'
Fix slow saving by not clearing cache every time.
Update README.rst

better english 
finded is not a word, and be is not past tense.
Merge branch 'fixSlowSaving' into develop
Don't use a t.co link for the screencast link.
Allow Pyrun to deal with sys.exit termination
Fixing the quickfix window output. Better errorformat
Adding 'Traceback' line to quickfix errors, for clarity
Commenting the errorformat string
Add pymode#Execute function to wrap calls to python interpreter. Extract setting up sys.path responsibility into a separate autoload module. Modify run.vim to support pymode#Execute.
Add pymode#Execute to doc, lint and queue.
Do not indent and other ftplugin if g:pymode is zero.
Remove unnecessary check for pymode state in buffer scope.
Merge pull request #274 from codito/fix_pymode_load

Fix pymode load
Merge pull request #273 from codito/extract-python-execute

Extract python execute
Merge with lawrenceakka
Update changelog.
Prepare to python3 support