Add formset renderer, formset form, configs, demo ... in order to show non form errors
Merging form set renderer, thanks @xsurfer
Merge pull request #121 from xsurfer/issue_119

Issue 119
Introducing bootstrap_form_errors tag, thanks @xsurfer
Fix bug in demo introduced in manual merge
Small code style changes
Preparing 4.5.0
Merge branch 'release/4.5.0'