Update twitter bootstrap to v3.2
Include config file diffs in the HTML view
Do not try to include the config file diffs when they aren't available
Do not omit empty lines from the diff object
Add test
Merge pull request #281 from SUSE/review_141010_show_config_file_diffs_in_html_view

[Review] Request from 'aduffeck' @ 'SUSE/machinery/review_141010_show_config_file_diffs_in_html_view'