UV-CDAT 2.12

Issue#158 1 (#160)

* Fix CF-1 Conventions for GPCP

* Fix GPCP and break other tests

* Check dimension of coords and pep8 dataset.py

* Add GPCP test

* Delete fvariable default missing_value

* change test for DRS

* temporarly disable tests

* create rectangular grid for axis of length 1

* fix GPCP grid

* fix fill_value comparison to N/A

* fix array comparison issue

* remove space

* add BaseException to try statement

* limit axis and varname to 127 characters

* limit axis and varname to 127 characters

* limit axis and varname to 127 characters

*  get rid of pdb

* pep8 dataset.py

* pep8 crossSection.py from regrid2