add ability to specify output path

[miraculixx]

now accepts options to specify the output path:

# output to path/to/res/screen
$ cordova-splash -p path/to/res -s screen  

To improve compabitility with the cordova splash screen plugin, the default output path is now config/res. Note this breaks backwards compatibility. The --compat switch preserves the previous behavior, i.e. uses the respective platforms path.

[gonzaloserrano]

I need something like this <3