Merge pull request #4 from mynameisfiber/master

Bugfixes and more reliable expiration policy
changed goredis to redigo in link (href was ok)
Merge pull request #6 from arnehormann/patch-1

change goredis to redigo in link (href is ok)
Merge pull request #7 from mynameisfiber/master

goforget: "Failed to update" error before complete decay
Merge pull request #8 from mynameisfiber/master

Added /dbsize handler to help with TD-IDF calculation
Attempt to reconnect to redis on error