code cleanup

- removed legacy code relating to sqlite3
- removed other unused functions
removed extraction of dbm keys to memory
updated .gitignore
modifications to hitmanager to handle server-side hit fetching
more constant constants in hit_manager, added cutoff_id arg to all_hits()
new hits count now returns count of hits with review status, hit_server can set 'seen' status
Merge branch 'future' of github.com:cmyr/anagramer into future
added keeping track of post times to hitmanager
minor typo and bug fixes in hitmanager and datahandler
resolving conflicts in hitmanager
debug stuff in hit_server
twitterhandler now reraises an exception of a requested tweet is not found.
Merge branch 'justdbm' into future
cleanup of unused stuff after merging in justdbm branch, removed debug settigns form hitserver
removed duplicate stats from dbm merging
fixed imports
fixes in hit_server
love introducing typos!
Merge branch 'future' of github.com:cmyr/anagramer into future
added some debug stuff to hit_server