axonomy default value

add support for taxonomy default value when options is set
Extension limitation with fileupload

Attempt to establish a test on the fileupload (js) to allow only certain
file type.
Using the keyword "extensions" word in the declaration of the fields in
contenttypes.yml
Bolt.js text corrections

semantic translation errors
PSR-2 Correction

Tabs to spaces conversions
Merge branch 'master' of github.com:odlex/bolt into odlex-master

Conflicts:
	app/src/Bolt/Content.php
Merge branch 'master' of https://github.com/bolt/bolt
Small fix for:
"PHP Notice:  Undefined index: singular_slug in app/src/Bolt/Config.php
on line 217"
Add ability to define attributes for image fields. Only 'title'
supported/required now.
Handle case where template designer uses <img src="/files/{{ record.image
}}">
Merge pull request #996 from GawainLynch/feature/ImageAttributes

Feature/image attributes
Merge pull request #992 from GawainLynch/hotfix/singular_slug

Small fix for PHP Notice:
Fixes #982

Sorting preference is not taken into account when getting content by taxonomy
Merge pull request #999 from flrvt/hotfixes

Fixes #982
Require 'dev-master' for ircmaxell/RandomLib
Updated Travis.yml, have composer prefer source to bypass GitHub API limits.
Added clear error message when both name and slug are missing. Same for singular_name and singular_slug. Fixes #998.
Fix for theme_path setting. Fixes #995.
Move "theme_path" waaay down in config.yml.dist. This is not something people should change, unless they know that they're doing.
Tweaking simpleforms: Use our own Dumper.
Let select field type values be those from a specific field on a set of Contenttype records