Further integration of bootstrap
Replace tabs and other navigation items from jQueryUI with bootstrap
Replace jqueryUI's modal dialog with bootstrap's
Update jqueryUI files, removing unecessary plugins
Set default button class
Update the pagination CSS classes
Fix some pep8 formatting errors and the schedule test
Refactor the tag filters used for form rendering

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rename : wger/manager/templates/mobile/tags/yaml_form_element.html => wger/manager/templates/mobile/tags/render_form_element.html
rename : wger/manager/templates/tags/yaml_form_element.html => wger/manager/templates/tags/render_form_element.html