Add default return value for request data

Allow overloading of the default return value of NULL when
requesting request data.

Example:
  http://host/action?foo=bar&abc=123

  $app->request->get('foo')        -- [bar]
  $app->request->get('bar')        -- [NULL]
  $app->request->get('bar', false) -- [FALSE]
Bump version numbers
Fix merge conflicts
Let build status represent master branch only

Remove stowaway file
Controller as \class::method
[] -> array()
Fix Environment path parsing regression
Merge branch 'release-2.3.4'
Bump version number
Added Missing Http Statuses From IANA Standard

Added missing Http Statuses from IANA (The Internet Assigned Numbers Authority).
http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
Fix urlFor adding extra slashes on Windows OS #663
Merge branch 'release-2.3.5'
Bump version
Fix urlFor adding extra slashes on Windows OS #663
Bump version
Changed from ltrim to str_replace to remove multiple backslashes
Changed from ltrim to str_replace to remove multiple backslashes
Merge pull request #664 from dangerousdan/develop

Added Missing Http Statuses From IANA Standard
.travis.yml - add PHP 5.5
Add property typehints for proper IDE support.