Display ASSIGN_IP state correctly in the mainwindow
add darwin prefixer and launcher
re-add osx pyinstaller build scripts
separate development deps

so we can use them with "pip install -r requirements-dev.pip"
syntax fix for python 2.6
fix osascript invocation
add changes description
update pyinstaller install
add leap.common to requirements
Handle configuration and paths in a standalone way

Also, abstracts QSettings under LeapSettings and adds a way to define
the VPN env in a platform dependant way.
Add changes file
Fixes as per review
Wrap bool setting casting in a method
change development repo to leapcode
fix docstring
Merge remote-tracking branch 'kali/feature/osx-eip-rewrite' into develop
Add Windows prefixer
Add Windows VPN Launcher
Alias cp65001 to utf-8 for Windows
Make Windows use a regular socket