Deprecate static classes Footnotes, Endnotes, and TOC (#206); Reactivate `phpcpd` and `phpmd` on Travis
Fix Travis build error
More refactoring for PHPMD compliance
Merge branch 'develop' into nonstatic
QA: PHPMD fixes for `tests`; Some adjustment for Travis build
Fix .travis.yml
Merge remote-tracking branch 'upstream/develop' into nonstatic
Merge pull request #220 from ivanlanin/nonstatic

Remove static classes #206; Reactivate PHPCPD and PHPMD