Merge pull request #5 from alex-boehm/master

Merge some fixes from forks
[TASK] Raise version information in EM conf
[CLEANUP] Remove DAM Frontend Migration Scheduler Task
[FEATURE] Add extbase-command controller for CLI
[CLEANUP] Optimize scheduler task to be run in CLI mode
[TASK] Raise version to 1.2.0
split big method into smaller unitTestable methods. Some code cleanups
get first migration task tx_dam->sys_file back to work
Add an AbstractClass for better overview. Repair task to migrate related dam records (dam_ttcontent)
better implementation to migrate tx_dam_selection records to sys_file_collection
better implementation of additionalFieldProvider. Overworked Category Migrator. Add Hook to show a recursive level of 12 in sys_category fields of tt_content
Add migrator for category relations
Updated Documentation and pre process images for better thumbnail implementation
DAM->FAL task throws a warning in foreach
activate thumbs for tt_content overview in page-module
add index for deleted and _migrateddamuid col. Better Query to find all not migrated DAM records.
File Migration Module searches for not deleted records, but there is no col deleted in this table.
better index for tx_dam. Migration task collects data MUCH faster now.
add new task to migrate <media>-Tags in tt_content-elements
make .* lazy