Distribution: add HockeySDK and configure

- Pass Hockey app/secret keys in from
  private xcconfig file using scripts/build.sh
Hockeyapp: remove CHANGELOG from copy bundle phase
Build: add ability to sign with ad-hoc cert and output ipa file

- build.sh codesigns igcs  xcarchive with the igcs
  ad-hoc cert and creates and ipa file. The results
  are put in the build directory.

- Update gitignore

- Add MIT license to build.sh
Build: set target app versions to 1.0 and build to 1
Build: update comment and echo in build.sh
Build: automatically upload build to hockeyapp.net
Build: bump all build version numbers

- set version scheme to apple generic
- use agvtool to bump build number each build
- add current git hash to notes field when
  uploading app to hockeyapp.net using build.sh
Build: use build number in file names
Build: fix dSYM.zip hockeyapp.net upload issue

- It was my fault. Forgot the -r arg for the zip
  command...

- Added branch name to hockeyapp.net notes.
Build: add top level build dir to gitignore
Build: script now bumps version one higher than what's on hockeyapp.net
Bump version to 12
Bump version to 13
Build: Use full version name in commit message
Build: update some message text in build.sh
Merge pull request #84 from fightingwalrus/build-script-and-hockeyapp

Build script and hockeyapp