Added PyLint configuration file
Code review of boot package

- Corrected code format, according to PEP-8 and PyLint
- Replaced boot.looper.utils.EventResult by pelix.utilities.EventData
Code review of 'config' package
Code review of debug and instruments packages
Use jpype.JavaException instead of _jexception

Also: code review of the java package
Code review of package repositories
Code review of shell commands
Code review of package "utils"
Code review of the "vote" package
Corrected documentation strings in shell.forker
Removed unused modules

- Unused forker modules (discovery, heartbeat... -> replaced by Herald)
- Removed signals modules (-> replaced by Herald)
Code review of package "forker"