replaces deprecated Tabula class method for debug
switch to Bootstrap Tour from Chaardin, fixes #112
Merge remote-tracking branch 'origin/intro'

Conflicts:
	webapp/tabula_debug.rb
use ObjectExtractor instead of TableGuesser to write tables.json
Merge remote-tracking branch 'origin/no_tableguesser' into extractor-new-methods

Conflicts:
	webapp/views/pdf_view.html.erb
things