[TASK] Raise development version to 7.2.0

Also set max supported TYPO3 version to 6.3.99 to allow installs on git master TYPO3 cores.
[TASK] Add autoload entry to composer file
[TASK] Avoid deprecated function
[TASK] Report coverage from Travis
[DOC] Add coverage badge
[TASK] Create empty "src" dir in build
[TASK] Move git metadata in after build script
[DOC] Replace Travis build badge
[TASK] Add coveralls config
[TASK] Adjust build script directory switching
[TASK] Adjust build script directory switching
[TASK] Adjust build script directory switching
[TASK] Remove coveralls config, rely on defaults
[TASK] Fix build script
[TASK] Enable build logging
[TASK] Add coveralls config with src_dir Classes
[TASK] Avoid moving files in build script
[TASK] Clean up build script
[DOC] Switch to development coverage badge
[BUGFIX] Manually assign settings array from plugin signature