Optimize aspect prediction calculations

[ShadowKyogre]

For those types of alarms for a feature in the future (not to mention, it'd be handy for new moon/full moon cleanups since we're using swisseph).

Relevant links:

• https://groups.yahoo.com/neo/groups/swisseph/conversations/topics/3823
• http://bazaar.launchpad.net/~keturn/py-moon-phase/trunk/annotate/head:/moon.py
• http://stackoverflow.com/questions/2526815/moon-lunar-phase-algorithm

[ShadowKyogre]

Found out while I was working on another app, the phase prediction is awfully funky. Thankfully the new algorithm that's going to be implemented is a lot simpler. Just give me a few moments.