Add 'verbosity' config option and default

This adds the the 'verbosity' argument to all of the functions.
which allows setting the verbosity level for everything individually.
Add message for a configuration file error
Fix comparison to True/False syntax
Fix setup.py, use 'py_modules' and remove a dep

'archmap.py' is still a single file, so use 'py_modules' over 'packages'.

Remove 'github3.py' dependency, it is an optional extra that isn't used
without 'geojsonio' (which is not packaged yet).
Move around 'message()' placement in archmap.py
Fix output format capitalization and syntax
Rename output filenames, output.* -> archmap.*

Changed default output filenames:

- users.txt -> archmap_users.txt
- output.geojson -> archmap.geojson
- output.kml -> archmap.kml
Wrap a really long line in 'archmap.py'
Remove TOC and headers from 'Usage' index in docs

Too many TOCs!
Fix geojsonio import

Initialise the 'geojsonio' variable as 'True' if the module was imported.
Update function call, 'to_geojsonio' is now display.
Fix bug #7, use the json module to tidy up GeoJSON
Add 'docs' and 'license' shields to README.rst
Commonise project names, archmap.py -> archmap

This also changes the syslog identifier:
ArchMap -> archmap

Issue ref: #10
Add docs info about how to use the script locally
Minor: whitespace
Add external links to docs
Add line breaks to user and GeoJSON output
Fix closing of the CSV file
Remove 'universal=1' option from 'setup.cfg'

'archmap' does not work with python 2.x
Specify python version to be used in install docs