Merge pull request #184 from fabiomcosta/master

Fix usage of pilfont.py script
Revert pull request #45
Fix rendered characters have been chipped for some TrueType fonts

This patch is from http://pastebin.com/jP2iLkDN
Merge pull request #185 from tk0miya/master

Fix rendered characters have been chipped for some TrueType fonts
DRYing out the code