Database connection module [0.1.0]

This version introduces multiple enhancements:

created module to handle database connections and queries

Details of additions/deletions below:
--------------------------------------------------------------

Added:      /Lib/Core/Db/etc/config.ini
            -- Added --
                module configuration

Added:      /Lib/Core/Db/Initialize.php
            -- Added --
                initialize database connections

Added:      /Lib/Core/Db/Helper/Mysql.php
            -- Added --
                handle queries as single object

Added:      /Lib/Core/Db/Helper/Connection/Mysql.php
            -- Added --
                handle mysql database connections

Added:      /Lib/Core/Db/Helper/Abstract.php
            -- Added --
                queries handler abstract class

Added:      /Lib/Core/Db/Model/Resource/Abstract.php
            -- Added --
                resource handler abstract class

Modified:   /doc/events.md
            -- Added --
                some db events

Modified:   /Lib/config.ini
            -- Added --
                core_db option
            -- Updated --
                changed version from 0.7.0 to 0.8.0
            -- Removed --
                database section moved to Core_Db module