Modernized to use newer Objective-C syntax.
Removed unnecessary KVO code in Cocoa demo app.
Fixed compiler warning new in Xcode 6.1 on 10.10.
Fixed analyzer warning due to possible NULL argument to dispatch_retain() when targeting 10.7 or earlier.
Removed all explicit @synthesize statements, which have not been needed for a long time now.
Minor update to README.
Added Podspec file.
Updated podspec to 1.0.4.
Fixed copyright notice in header in ORSSerialRequest.h/m.
Merge branch 'master' into RequestResponse

Conflicts:
	Source/ORSSerialPort.m