Add info and debug output

[antisnatchor]

Add a CommonUtil class that will contains for now the following methods:

print_info print_debug

These will be used to print messages on the console, while watchtower is parsing the code and generating the report.

So print_info something like: [+] Parsing files [+] Generating report

Andprint_debug something like: [D] 100 Java files found (for example)

IT would be nice to have the time as well, at the left of the [+] [D] strings