Log Message:
Update ruby-sinatra to 1.2.7.

= 1.2.7 (backports release) / Not Yet Released

Custom changes:

 * Fix Ruby 1.8.6 issue with Accept header parsing. (Konstantin Haase)

Backported from 1.3.0:

 * Ignore `to_ary` on response bodies. Fixes compatibility to Rails 3.1.
   (Konstantin Haase)

 * `Sinatra.run!` now prints to stderr rather than stdout. (Andrew Armenia)

 * Automatic `app_file` detection now works in directories containing brackets
   (Konstantin Haase)

 * Improved documentation. (Emanuele Vicentini, Peter Higgins, Takanori
   Ishikawa, Konstantin Haase)

 * Also specify charset in Content-Type header for JSON. (Konstantin Haase)

 * Rack handler names will not be converted to lower case internally, this
   allows you to run Sinatra with custom Rack handlers, like Kirk or Mongrel2.
   Example: `ruby app.rb -s Mongrel2` (Konstantin Haase)

 * Fix uninitialized instance variable warning. (David Kellum)

 * Command line options now complain if value passed to `-p` is not a valid
   integer. (Konstantin Haase)

 * Fix handling of broken query params when displaying exceptions. (Luke
   Jahnke)