Update to Twig 1.15.0
added is_callable to check callback function
Merge branch 'master' of github.com:jarednova/timber

* 'master' of github.com:jarednova/timber:
  Adding a filter to allow overriding of locations returned by TimberLoader get_locations.
Merge branch 'master' into dev

* master:
  added is_callable to check callback function
  Adding a filter to allow overriding of locations returned by TimberLoader get_locations.
  Close #101 -- now gives output in error log if resized image error (permissions issue, for example)
  Updating change log and version number
close #136 -- "1" appearing before widget output
close #135 -- image w/h flipping on tall images
Wrote a test for #135
Wrote test for #136
Close #131 -- dealing with missing </p> tags in post.get_preview
added pagination for posts, need to figure-out how to do link structure w/o re-writing from WP core
complete post pagination links
finished pagination things