changed the names of the server Rake tasks because they conflict with
the Bundler::GemHelper rake tasks.

it is often convenient (or necessary) to build the calabash-cucumber
gem locally.  using the Bundler::GemHelper:

rake install

however the 'install' task is overridden by the build_server, which is
not ideal
calabash-ios console now checks for a local .irbrc file before falling back to the .irbrc file in the scripts directory
does a better job of finding a compatible recording when os=ios7

when testing on iOS 5 + 6 and os=ios7, i was seeing:

Playback not found: touch_done_ios7_iphone.base64

updated the code to search for the next existing recording

NOT TESTED ON THE IPAD
fixes Device.iphone_5? method for Xcode 5 simulator (device syntax changed)
adds ios7? method to Device class
Merge pull request #177 from jmoody/0.9.x-updates-device-class-for-Xcode5-ios7

updates the Calabash::Cucumber::Device class for Xcode 5 and iOS 7
Merge pull request #174 from jmoody/0.9.x-calabash-ios-console-should-read-local-irbrc-file

'calabash-ios console' command now tries find local .irbrc before falling back to the .irbrc in the scripts directory
Merge pull request #175 from jmoody/0.9.x-load-playback-not-loading-anything-for-ios7

fix for 'Playback not found: touch_done_ios7_iphone.base64' when testing on iOS 5 + 6 and 'OS=ios7'
Merge pull request #173 from jmoody/0.9.x-rename-rake-task-for-GemHelper-compat

renamed the rake tasks for building the server to be compatible with Bundler::GemHelper install/build/release
updates iphone_5? method to correctly report false when called on an
ipad simulator target (was crashing)
Merge pull request #179 from jmoody/0.9.x-device-iphone_5_method-crashes-on-ipad-target

Device iphone_5? method crashes when called on iPad devices
adds verbose error reporting when playback fails to find file

example:
irb(main):001:0> playback("nothing")
Screenshot at screenshot_0.png
RuntimeError: Playback file not found for: 'nothing' =>
  searched for =>
    * 'nothing_ios6_iphone.base64'
    * 'nothing_ios5_iphone.base64'
  in directories =>
    * '/Users/moody/git/xamarin/juke/LessPainfull/playback'
    * '/Users/moody/git/xamarin/juke/LessPainfull'
    * '/Users/moody/git/xamarin/juke/LessPainfull/features'
    * '/Users/moody/.rbenv/versions/1.9.3-p392/<snip>/lib/calabash-cucumber/resources/'
playback cannot be found for some combinations of OS and playback file
* fixes problem introducted (by me) in pull 175
Merge pull request #180 from jmoody/0.9.x-playback-broken-by-pull-175

playback cannot be found for some combinations of OS and playback file
Merge branch '0.9.x' into 0.9.x-playback-verbose-reporting

Conflicts:
	calabash-cucumber/lib/calabash-cucumber/core.rb
added comment for the interpolate function - never called?
made the playback search algorithm easier to understand
BREAKING CHANGE record_end saves to PLAYBACK_DIR (if defined) or to ./features/playback
BREAKING CHANGE default playback search directory is changed from ./ to ./features/playback
Merge pull request #181 from jmoody/0.9.x-playback-verbose-reporting

adds verbose error reporting when playback fails to find file