Merge pull request #30 from spnkr/master

Prevents crash in REPL when calling person.photo by having person.photo return a UIImage
add "photo_image" method to person to get the UIImage of a photo

This is related to issue #29/pull #30 where calling photo in the repl caused problems.
Returning the image is a good idea but we don't want to break existing code with a minor release (semver)
error handling on populating groups
rake spec clean under RubyMotion 2.0
verified that timestamp-properties bug is not yet fixed
Merge pull request #31 from jmay/master

bug in adding contacts to groups
Added ability to get vcard for one or many AddressBook::Person object

Suggested in issue #34
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into RM2.0
BW doesn't need .osx now for RM2.0; must clean up after tests
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