Almost completed http.AirOS backend + test
 * added support for mechanize, requests removed
 * added test module for http.base and http.airos
 * http.base.test_get_json() needs a review --> strange JSON error
Improvements and renaming in http.base
Added properties in http.AirOS backend
Added networking part in http.AirOS backend
Added tests for all properties in http.airos backend
 * strange no JSON to be decoded error, needs review
Fixed typo in test.http.base
Renaming from essid to ssid from both sourc and test in http.AirOS backend
Refactoring of http.AirOS backend
 * info property moved from base.py to airos.py
Added first draft of to_dict method in http.AirOS backend + test
 * fixed JSON error in test (the device did not authenticate, so no JSON to decode)
 * hardcoded user and password
Changes
Reverted hardcoded password in http.airos test
Modified raised exception in http.airos backend and some code cleaning
Added name property in http.AirOS + test
Added uptime property in http.AirOS + test
http.AirOS: renamed _host_info to _status_cgi
test.http.base: removed useless test
http.AirOS: removed hardcoded ip address
http.AirOS: changed cast from int to float
http.AirOS: simplified authentication code
test.http.AirOS: added info and iflist tests