ARM-DOE/pyart — pull request #85 by jjhelmus (2013-09-04 22:15:25+00:00)
Title: ENH: Faster reading of sigmet files and support for missing rays

* Sigmet files are read as speeds similar to RSL using the Cython SigmetFile
object.
* Sigmet files which contain rays which were not collected are returned as
proper radar object with the missing rays excluded from the data.

For comparison before this refactor reading a sample XSAPR PPI using the SigmetFile object took 7.2 seconds, now reading the same files takes 1.0 seconds. Loading the data into a RslFile object takes 1.1 seconds.