autoload 6.x-1.2

This release fixes a critical bug in 1.1. In earlier versions, the lookup table was rebuilt on every failed lookup on the logic that you're unlikely to actually trigger a lookup unless you actually had data. However, I discovered that was causing dozens of cache_set() calls per page, which is doubleplusungood. This version uses hook_flush_caches() to rebuild the lookup table instead, which is really should have done in the first place.