Eduvpn-client

fixed issues:
* add choice for 2FA method (if enabled) 59
* make python 3 debian package low priority 44
* documentation doesn't generate well due to missing modules 54
* show notification if account is disabled 60
* messages can use some formatting 58
* enable online test suite 52
* improve test suite 45
* make sure 2fa is working 51
* issue with oauth requests module on Ubuntu 14.04 53
* prettify notification 57
* update connection switch when user connects using networkmanager low priority 36
* probably bug in networkmanager or dbus package for fedora 26 42
* The "Connected" button breaks often 56

resolved issues:

* revoked token gives error 49
* choosing profile does not work 50
* refresh tokens not implemented 48

* add headers to all files 29
* modify 'display_name' to "eduVPN for Linux" 37
* give user choice to open browser or show link 30
* http callback window acts funny when closed 34
* add logic to refresh configuration / certificates 24
* add support for newer networkmanager signals 43
* Make RPM 39
* no notification 32

fix test suite and python3 compatiblity, required for RPM.

small problem with icon path