Merge pull request #61 from segasai/master

pip installation doesn't work
support for named field in read_map, e.g. 'II_cov'
note on issue with HEASOFT cfitsio, issue #62
automatically try to fix bad header in read_map
improved docstring of alm2map_der1, closes #63
preparation for release 1.4.1
fixed test on anafast, issue #64
added comment on test case, issue #64
added back support for CFITSIO_EXT_LIB and CFITSIO_EXT_INC
changed documentation
close fits file in read_cl
fixed concatenation that causes error on numpy 1.7.0, closes #66
Merge pull request #65 from healpy/cfitsioinclib

added back support for CFITSIO_EXT_LIB and CFITSIO_EXT_INC
just warns about missing CFITSIO prefix but tries to compile anyway
added support to the readme
added max_pixrad to docs, PR #49
improved doscstring in max_pixrad, PR #49
Support building a vec3 from a location (called in Java healpix a "Hploc").
This is used for the Healpix_Base::corners() method.
Adding Healpix_Base::boundary method to calculate the boundary of a pixel.
The implementation is a port of the Java HealpixBase.boundaries method.
Add python-level support for new boundary function.