Expand server support section in README
Improve logging code
Use multiple connections when syncing.
Don't use multiprocessing when having one process
Update cfg about special case in multiprocessing
Merge pull request #35 from untitaker/multiprocessing

Use multiple connections when syncing.
item_types is not valid for carddav
Improve error messages on wrong storage params

Fix #38
Add more documentation to example.cfg
Clarify which kind of MIT we use.
Fix #40
Fix #39

See http://stackoverflow.com/a/1408476
Remove unnecessary lines
Rewrite build scripts
Only install coveralls and vdirsyncer for tests.
Remove useless functions
Remove requirements file
Update README re build scripts
Flake8
Don't actually change directories