shell, disc, resource and blue module changes

fixes for shell help
some fixes for resource abstract, also added methods to delete data from table
added tracer and events for common disc class
changed initializeObject to get data as reference

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

Modified:   /Lib/config.ini
            -- Modified --
                changed version from 0.14.1 to 0.15.0

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

Modified:   /Lib/Core/Shell/Helper/Cache.php
            -- Updated --
                usageHelp, fixed help description

Modified:   /Lib/Core/Shell/Model/Abstract.php
            -- Updated --
                _showHelp, fixed parameter checking
                usageHelp, fixed help description

Modified:   /Lib/Core/Db/Model/Resource/Abstract.php
            -- Added --
                returnCollectionSize, to return number of elements in collection
                _prepareDeleteQuery to prepare delete query
                delete to remove data from table
            -- Updated --
                $_dataType, added missing documentation
                load, adedd column handling
                _transformStructureToInsert, fixed create insert query
                save, added event directly after execute query
            -- Removed --
                returnedRows

Modified:   /Lib/Core/Blue/Model/Object.php
            -- Updated --
                __construct, added data to initializeObject method
                initializeObject, adedd parameter with reference

Modified:   /Lib/Core/Disc/Helper/Common.php
            -- Updated --
                delete, added tracer and events
                copy, added tracer and events
                mkdir, added tracer and events
                mkfile, added tracer and events
                rename, added tracer and events
                move, added tracer and events
                readDirectory, added tracer

Modified:   /Lib/Core/Shell/etc/config.ini
            -- Modified --
                changed version from 0.1.0 to 0.1.1

Modified:   /Lib/Core/Db/etc/config.ini
            -- Modified --
                changed version from 0.4.2 to 0.5.0

Modified:   /Lib/Core/Blue/etc/config.ini
            -- Modified --
                changed version from 0.6.1 to 0.6.2

Modified:   /Lib/Core/Disc/etc/config.ini
            -- Modified --
                changed version from 0.2.0 to 0.3.0