First request#1

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keflavich wants to merge 2 commits intoastrometry:masterfrom

keflavich:master

Commits on Dec 29, 2012

Added first go at build-index / solve-field wrappers
keflavich
committed

Commits on Dec 31, 2012

fixed typos, added preset finder, checked for write access on data/ dir
keflavich
committed