Log Message:
py-ephem: update to 3.7.6.0

Version 3.7.6.0:
The new ephem.cities.lookup() function runs a Google geocoding search and \ 
returns an Observer object for the top result.
When an Earth satellite position cannot be computed, PyEphem now raises an \ 
exception instead of freezing and locking up Python.
Upgraded to the libastro from XEphem 3.7.6, bringing improvements to Earth \ 
satellite transit calculations.
GitHub issue 76: Earth satellite velocity is now calculated with greater accuracy.
GitHub issue 64: rising and setting routines are now careful to restore your \ 
Observer.date even if they die with an exception.
GitHub issue 56: Earth satellites now raise an exception for dates a year or \ 
more from their TLE epoch, because libastro refuses to process old elements and \ 
would return nonsense coordinates.
GitHub issue 44: a segmentation fault would eventually kill Python 3 if a script \ 
called Body.copy() either directly or via the Standard Library copy.copy() \ 
function.