PEP8, fix issues, update credentials, appends version number (Fdroid)

• now PEP8 compliant 11d96b3
• fix requests2 requirement 4a20c1b
• now possible to override root-wide conf file with local conf file 20f65ca
• androguard is now fetched from pypi af1ddb9
• now appends the version number to the apk filename (like org.mozilla.firefox-1234.apk), useful for Fdroid a2fc722
• Fix bad SSL certificates path 3f411ef
• add libssl-dev requirement 1c17621
• fix a 401 bug due to too quick ask to the Google server d38923c
• update credentials de4bcd9