Update astropy.time setup to allow using system sofa_c library
Add What's New for io.ascii
Add What's New for Data Tables and stub for I/O infrastructure
Remove example in What's New ASCII table I/O (too long for a small point)
Add What's New for astropy.time
Add a maximum width to the main text body in the docs
Merge pull request #656 from taldcroft/whats-new

What's New in 0.2 for io.ascii, table, and time
Merge pull request #657 from nhmc/css_tweak

Add a maximum width to the main text body in the docs
Merge pull request #606 from taldcroft/use-system-sofa

setup.py: `--use-system-sofa` missing