refactor AbstractFormBuilder, deprecate things
move setup-oriented methods from application.rb file, remove non-public banginess
fix stylesheet_link_tag and javascript_include_tag to use proper concat
this should remove the need to `==` these helpers
Added [SpiderGazelle](https://github.com/cotag/spider-gazelle) to the list of application servers.
Merge pull request #1599 from padrino/refactor-abstract

refactor AbstractFormBuilder, deprecate things
cleanup html_safe
revert untested behavior, ref b4802b239bf7
Removed minitest constrain to version ~>2.6.0

Fixes #1601.
refactor some Rendering
Refactor the activerecord tasks
temporarily expose breakdown of padrino-mailer test, fix it
`bcrypt-ruby` has changed its name to `bcrypt`.
https://github.com/codahale/bcrypt-ruby/blob/master/bcrypt.gemspec#L2

Here's the update warning:
```
Post-install message from bcrypt-ruby:

The bcrypt-ruby gem has changed its name to just bcrypt.  Instead of
installing `bcrypt-ruby`, you should install `bcrypt`.  Please update
your
dependencies accordingly.

```
Merge pull request #1602 from padrino/refactor-activerecord-task

Refactor the activerecord tasks
Bump thor version to 0.18.x, closes #1605
fix #1600, replace html_safe with more effective safe_concat
relax jruby mode, test AS 4.1.0.rc1, bump ruby for sinatra edge