Merge pull request #95 from warvariuc/master

Code polishing
restore py26 comapt
doctests to unittests
doctests to unittests
doctests to unittests
doctests to unittests
doctests to unittests
doctests to unittests
doctests to unittests
doctests to unittests
doctests to unittests
doctests to unittests
update readme
+roadmap
default_encoding and sequencetypes as const in __init__
Added % symbol to some tests
Merge branch 'master' of git://github.com/collective/icalendar
Added myself to the contributer list