Adding the "how to gitify" instructions

This takes the cleaned up instructions we wrote for the Catalyst Academy and makes them part of the canonical documentation for koha-gitify.
Merge pull request #8 from wizzyrea/patch-2

Adding the "how to gitify" instructions
Fixed a couple of commands that weren't in boxes

Also fixed up some spacing.
Merge pull request #9 from wizzyrea/patch-3

Fixed a couple of commands that weren't in boxes
Minor formatting tweaks
fix apache config naming in newer versions of koha

resolves https://github.com/mkfifo/koha-gitify/issues/10
adding wrapper around File::Copy to detect error cases and report them
Making errors a little more obvious
fixing minor typo in readme