Merge pull request #24 from brandon-rhodes/master

Run all tools by default if no “--tools” is given?
Add 4x speed improvement by avoiding redundant I/O

Generating the simple summary page was taking 10+ seconds on my laptop.
By remembering which coordinate files have already been read instead of
re-reading them, this version runs in about two and a half seconds,
which will make further improvements to the report much less painful to
experiment with.
Add a grid for each tool setting it vs. all others

This lets the author of any one of the tools in question get, in a
single place, a summary of which of the other tools (if any!) their
results agree with.
Merge pull request #27 from brandon-rhodes/master

Add the Naval Observatory high-precision NOVAS lib
Merge pull request #28 from brandon-rhodes/feature/grid

Possible way to display each tool against all others
Updated astropy to vectorized API
Added NOVAS results
Split out matrix output and run-run all benchmarks
Link between two result pages
Move all tools to a 'tools' sub-directory
More tidying up
Add link to latest results
Measure speed of each tool for celestial conversions
Merge pull request #13 from cdeil/speed

Measure speed of each tool for celestial conversions