Merge pull request #35 from jmay/master

RubyMotion 2.0 support & Version bump to 1.4.0
added bubble-wrap ~>1.3 requirement to .gemspec

* weakened the requirement from ~>1.3.0 to ~>1.3 so we match anything in the 1.x line after 1.3.0 (making the assumption we will want to match 1.4.x when it arrives)
* also put the version requiment in the .gemspec where apps using this gem will find it
Merge pull request #38 from jmay/master

OSX support
simplified .travis.yml - i think what is required may have changed
updated README with a link to Apple's OSX docs
Add :prefix property
Merge pull request #39 from wejn/add-property

Add :prefix property
specs for person prefix
method-missing setters for OSX