[docs] get current version from pkg_resources
[docs] use current year in copyright
[docs] fix links
remove invalid section from index
[docs] add API docs

There are currently some issues:
* The layout is too narrow
* Everything is on one page
* Sphinx throws several warnings
* The order is random
* Everything is documented
[docs] only document icalendar.cal in the API docs
[docs] indent docstring for sphinx
README: typos
Merge pull request #150 from geier/README_update

README: typos
Merge remote-tracking branch 't-8ch/doc_fixes'
use sphinx_rdt_theme and document how to generate docs
rm old theme
include also prop api doc
chanelog
Added test to check the copy() function of CaselessDict
Modified variable names to follow PEP8 and removed semicolon
Fixed variable names
Merge pull request #153 from bradleyjkemp/master

Added test to check the copy() function of CaselessDict
Initial tz creation from VTIMEZONE components

This is currently brute-forced into cal.py, and only when VTIMEZONE
components come before DATE-TIME components that make use of them (while
this seems to be the standard way to generate icalendars, there is no
word about this in the RFC). To circumvent this, we would probably need
to rounds of parsing.

There are so many exceptions in from_ical() already, that I don't feel
to guilty about indroducing one more.

Tests are needed.
dateutil to requirements