Merge tag '0.6' into develop

release 0.6
+ some todos
+ todos
handy symlink
install all required package at bootstrap
extract method
fix dependencies installation
fixed
Merge branch 'feature/pre-install' into develop
+ some todos
+ providers list - for extensibility and priority mamagement
remove absolete functionality
update docs
Merge branch 'feature/providers' into develop
draft new version
Merge branch 'release/0.7'