Add a notice about "max_allowed_packet" to README

Some people ran into problems / errors about max_allowed_packet-setting of MySQL (e.g. #11).
It might be useful to raise this setting to a higher value (e.g. 64MB)
Merge pull request #20 from andygrunwald/patch-1

Add a notice about "max_allowed_packet" to README
[IMPROVEMENT] Ignore production config file

CVSAnalY provides a config.sample file and the possibility to add a
config file argument to run the programm.
If you copy config.sample to config in the same directory, the git
repository is always "unclean".
Solution: Ignore the config while which is used for production.
[IMPROVEMENT] Renamed file README to README.md for MarkDown view
[IMPROVEMENT] Reformatted README.md to get a better "design" in MarkDown editors
Merge pull request #21 from andygrunwald/ignore-config

[IMPROVEMENT] Ignore production config file
Merge pull request #22 from andygrunwald/markdown-readme

[IMPROVEMENT] Rename README and prepare them for better display in MarkDown editors
Wrong pattern in GitLineCounter

The pattern should match a case when the change is in 1 file, or the change introduces 1 insertion or 1 deletion
(in that case git prints word in singular form not plural)
Merge pull request #23 from shakhat/bug/git-line-counter

Wrong pattern in GitLineCounter
Adding MyISAM Engine to extensions Weeks and Months