bump ruby point version
bump sinatra

1.4.4 -> 1.4.5 changes:

 * Improve tests and documentation. (Seiichi Yonezawa, Mike Gehard,
Andrew
   Deitrick, Matthew Nicholas Bradley, GoGo tanaka, Carlos Lazo, Shim
Tw,
   kyoendo, Roman Kuznietsov, Stanislav Chistenko, Ryunosuke SATO, Ben
Lewis,
   wuleicanada, Patricio Mac Adden, Thais Camilo)

 * Fix Ruby warnings. (Vipul A M, Piotr Szotkowski)

 * Fix template cache memory leak. (Scott Holden)

 * Work around UTF-8 bug in JRuby. (namusyaka)

 * Don't set charset for JSON mime-type (Sebastian Borrazas)

 * Fix bug in request.accept? that might trigger a NoMethodError.
(sbonami)
bump newrelic
bump unicorn

really just a documentation change, so just keeping the outdated list
smaller when reviewing.