Merge pull request #4 from tdwyer/master

khal.conf.sample :  Rewritten: complete, clean, and includes Self-Sign/Corp-PKI CA Cert verify
Add missing Content-Type header to Syncer
Merge pull request #6 from ibab/master

Add missing Content-Type header to Syncer
ikhal: removed 0 and $ from vim keybindings

somehow, they were even active in EditTexts
basic event DURATION handling
docstrings
updated copyright to 2014