migrate to bcrypt for password storage
bcrypt had bugs before 5.3.7
rating_to_name no longer exists
was removed in commit eadf1d9e87419a3f570cc9e7e77082358a9af0db
fixes negative tags not working if they don't exist
fixes #431
Merge pull request #427 from shish/bcrypt

Use bcrypt for password storage
Merge pull request #432 from DakuTree/patch-sqlfix

Fix for #431 - Fix negative tags not working if they don't exist.
Merge pull request #429 from DakuTree/patch-misc

Pool updates + other misc tweaks.
bumped the tag char limit to 255
there wasn't really much reason to have this so low, and this puts it to the same limit as other booru software
avoid errors if tag exceeds limit + flash message showing the problem tag
fix "Use of undefined constant DEBUG_SQL" error
DEBUG_SQL isn't defined during install (as the default config isn't loaded)
.tables only works with the SQLite3 CLI program
http://www.sqlite.org/faq.html#q7
alter_table_column_type function
FTAG README

Conflicts:
	README.markdown
FTAG EXT + 255 filename length
FTAG theme
updated ftag themelet
special tags
fix themelet
fix ftag link
don't show IP (as will most likely only be admin) + special tag