doc on recent change and bump version
docs
docs
docs
Ignore more keywords when writing a header

These are new keywords associated with compressed tables.
some docs on the FITSHDR class
retract change; these keywords should probably be passed through
fixed bug with eval of header records

eval by default looks at locals() and globals() and matches.  But
for this purpose we just want to convert to numerical values.
bump the version
bump the version
added cfitsio3370 and changes to setup.py to compile and link against it
don't re-run FITSHDR if the given header is already a FITSHDR
Merge pull request #22 from dstndstn/noevalheader

don't re-run FITSHDR if the given header is already a FITSHDR
Merge branch 'cfitsio3370'
use literal_eval instead of eval
readme docs
readme docs
readme docs
readme docs
updated changlog