SpiceyPy 3.1.0 release
SpiceyPy 3.1.0 release

- added irfnam, irfnum, irfrot, irftrn
- added kpsolv, kepleq
- better exceptions, many hundred spice toolkit defined exceptions
- copy button to docs codeblocks
- added CSPICE_SRC_DRI envvar override to specify cspice src directory
during install
- added CSPICE_SHARED_LIB envvar override to specify
cspice.so/.dll/.dylib during install

- switch to codecov for code coverage
- various support type changes
- renamed getspice.py to get_spice.py

- fixed missing doc strings for callbacks

- coveralls
- test cmd class in setup.py
- direct references to deprecated numpy matrix class

AndrewAnnex/SpiceyPy