- Added 'const' qualifier to the filename parameter because __FILE__ expands to const char *
- This fixes compiler warnings: "Sending 'const char [61]' to parameter of type 'char *' discards qualifiers"
- Add single quotes to device model name before it's passed to the 'defaults' command. Device model names with spaces ( e.g. 'iPhone (Retina 4-inch)' ) require single-quoting.
Merge pull request #45 from nzhuk/master

'const' fix and support for specifying retina devices for subliminal-test