removed __IPHONE_3_0 checks.
removed __IPHONE_3_1 checks
removed __IPHONE_4_3 checks.
removed __IPHONE_5_0 checks.
Merge branch 'master' into ios-5-min-2
Merge pull request #3223 from julapy/ios-5-min-2

ofxiOS - removing old deployment target checks.