Fix typos in REST API documentation.
Merge remote-tracking branch 'upstream/master'
consistent whitespace across the .rst docs, some minor corrections
gitignore PyCharm files
Replace RFC 2822 dates in resource  'date_' fields with native datetime objects.
Formatted test data with RFC 2822 dates (actual date & time has not changed)
remove contrib
Bump version to 3.4.3
Merge pull request #106 from twilio/remove-contrib

remove contrib
Add sip out TwiML verbs
Variable name cleanup
python 3 breakage
Reverting local change.
Fixing documentation of phone number purchase parameter.
Merge pull request #111 from alexcchan/master

Documentation fixes for conferences and phone numbers.
Delete Headers and Header
Merge branch 'master' into sipout-twiml
Remove Header test
Bring code up to PEP8 compliance
Bring tests up to PEP8 compliance (almost)