[pkg] osx helper and working qt installer

Makefile

bitmask.pro

branding/scripts/gen-providers-json.py

branding/scripts/getparam

branding/templates/bitmaskvpn/config.go

branding/templates/qtinstaller/config/config.xml

branding/templates/qtinstaller/installer.pro

branding/templates/qtinstaller/osx/post-install.py

...ng/templates/qtinstaller/osx/se.leap.bitmask-helper.plist

...ding/templates/qtinstaller/packages/bitmaskvpn/.gitignore

...templates/qtinstaller/packages/bitmaskvpn/meta/install.js

...emplates/qtinstaller/packages/bitmaskvpn/meta/package.xml

gui/build.sh

installer/.gitignore

installer/packages/riseupvpn/data/.gitignore

installer/packages/riseupvpn/data/README.txt

installer/packages/riseupvpn/data/post-install.py

...ller/packages/riseupvpn/data/se.leap.bitmask-helper.plist

pkg/helper/darwin.go

pkg/vpn/launcher.go