Merge branch 'master' into develop

* master:
  Fixed broken link
  fixed broken link
  ALM-635 remove link to wiki, link to new community website instead
  ALM-618 fixed syntax error in articles seeds, allow date entry back to 1660
  ALM-618 fixed small syntax error
  ALM-618 added cucumber tests for incomplete dates in import file
  ALM-618 added cucumber tests and fixed import rake task
  ALM-626 ask for UTF-8 when looking for canonical URL
  ALM-618 allow incomplete dates, only require year
  fix pmc parsing error
  ALM-637 add option to queue articles by start_date and end_date
  fixed broken URLs
  ALM-637 limit queue:all rake task by date range
  have sources menu in alerts sorted by group
added .travis.yml file
added coveralls badge
updated cookbooks
ALM-47 added scopus source to public repo, added institutional token, added documentation
don't show blank canonical url
ALM-47 updated db seeds
don't show blank canonical url
ALM-47 updated db seeds
ALM-47 added scopus source to public repo
Merge branch 'develop' of github.com:articlemetrics/alm into develop
ALM-618 fixed date validation test in v4 API
ALM-47 use hostname variable in tests
ALM-47 fixed typo
fixed report name
ALM-644 initial commit for stale source report
ALM-645 added doc model and more Active Record-like behavior. Added yaml header and moved images into assets folder
ALM-645 fix docs controller test
ALM-645 fixed cucumber tests for documentation pages
small UX tweaks: increased base font size to 18px, removed small source icons