Updating changes to my local copy.
Merge branch 'focus_bug_fix' of https://github.com/jbeast/s2_extraction_pipeline
Merge branch 'focus_bug_fix' of https://github.com/jbeast/s2_extraction_pipeline into return_key
Added onBarcodeScanned function event. It is emitted
when characters length equals 13 (barcode length).
Included return key behaviour for scan readers in
base_controller validation
Added Tabulator behaviour for changing to next input on barcode,
so barcode readers that emit tabulators at end of input could work as the carriage
return.
Merge pull request #311 from emrojo/return_key

Return key and Tabulator as ending line