textile format for build status. add dependency badge
add PyPI badges
some minor improvements on readme
Merge remote-tracking branch 'upstream/master'
added updated_on required values in test fixture
initial permissions tests
check perms decorator rewrited in traditional way
deprecate CHECK_PERMISSION_FUNC setting, replaced with CHECK_EVENT_PERM_FUNC setting
new CHECK_CALENDAR_PERM_FUNC setting for checking calendar permissions