Use preprocessor config instead of cflags

Newer terminology for relaunch.
Fail if finish_install tool name not defined.
Holy megabyte icon, Batman!
Avoid setting useless private font family name in the WebView
Disable plug-ins in release notes WebView
Removed 10.4 code
Merge pull request #1 from pornel/master

Merge
Removed an unused variable.
Fixed unit test bundle identifier
Make SUAppcastDelegate a formal protocol.
Synthesize more Objective C getters and setters using Objective C properties.
Move the NTSynchronousTask class to Objective C properties.
Use dot notation in NTSynchronousTask.
Change the getter for the done ivar to isDone.
Use for… in… Objective C enumeration where possible.
Merge branch 'master' into mountainLionAndLater