Bump version to 0.13.7

Implement force_stale and force_fresh options for API classes.
Either can be True (not both), in case of force_stale local data will
be used,
and when force_fresh is set local data will be ignored and data must be
from the server.
Add uptime to Network class to get total simultaneous uptime of some
stations.
Add more local data and add script to extend local data with more
(large) files.
Improve selecting showers with CorsikaQuery.
Versions 2.4.6 through 2.5.1 of Numexpr (from conda) will cause wrong
results
in some PyTables queries, this also affects CorsikaQuery.

doc/conf.py

@@ -50,7 +50,7 @@
 # The short X.Y version.
 version = '0.13'
 # The full version, including alpha/beta/rc tags.
-release = '0.13.0'
+release = '0.13.7'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

setup.py

@@ -7,7 +7,7 @@
 
 
 setup(name='hisparc-sapphire',
-      version='0.13.6',
+      version='0.13.7',
       packages=find_packages(),
       url='http://github.com/hisparc/sapphire/',
       bugtrack_url='http://github.com/HiSPARC/sapphire/issues',