Fixed cannot redeclare class error

Error shows up if the toolkit plugin is already running / activated
New object reference deprecated fix
Merge pull request #6 from bfintal/cannot_redeclare_class

Fixed cannot redeclare class error
Merge pull request #8 from bfintal/new_reference_deprecated

New object reference deprecated fix
Fixed get_current_theme deprecated php notice

Added a check for wp_get_theme since get_current_theme is already
deprecated in WP
Merge pull request #9 from bfintal/get_current_theme_2

Fixed get_current_theme deprecated php notice