Add Schema::table in tables

Not yet finished
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/database/migrations/2014_11_28_083330_create_it_attendances.php

	app/database/migrations/2014_11_28_083740_create_external_trainings_table.php

	app/database/migrations/2014_11_28_083952_create_educational_attainment_table.php
	app/database/migrations/2014_11_28_084030_create_speakers_table.php