Allow to pass arrays of validations to the validators
Add explicit require statement for Array.wrap usage
Documented devkit requirement for Windows

https://github.com/thoughtbot/paperclip/issues/1543
Fix intermittently failing spec

* `fog_spec.rb:328` fails intermittently due to a race condition
* Use [TimeCop][1] gem to freeze time during the spec
* Extract magic number
* Break long line

[1]: https://github.com/travisjeffery/timecop

![TimeCop
Poster](http://www.deconstructingmovies.com/wp-content/uploads/2014/03/timecop-poster.jpg)
Move Timecop gem from Gemfile into gemspec
Remove typo in contributing guidelines

Remove extraneous 'not'.
Documented devkit requirement for Windows

- With fixes as suggested by mike-burns
Improving AttachmentSizeValidator#human_size method
Updating Validators::AttachmentSizeValidator specs
AttachmentSizeValidator#human_size method works now with all supported Rails versions
Merge pull request #1551 from thoughtbot/ap-fix-typo

Remove typo in contributing guidelines
Fix data-uri with mime type that has `.` in it

Fixes #1550
Update Travis build configuration

* Change `rbx` to `rbx-2`
* Mark `rbx-2` as allow-failure again
Merge pull request #1546 from ezuhaib/master

Documented devkit requirement for Windows
Merge pull request #1531 from thoughtbot/ap-fix-spec

Fix intermittently failing spec
Merge pull request #1511 from Envek/arrays_in_validations

Allow to pass arrays of validations to the validators