allow injection of fonts directly into the font cache

[deano2390]

the motive here was to allow me to load fonts from the file system rather than the assets folder

[deano2390]

typical usage might be like so:

File fontFile = new File("regular.ttf"); Typeface font = Typeface.createFromFile(fontFile); TypefaceUtils.installFont("regular", font);

and then in your layout:

<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" fontPath="regular"/>

[deano2390]

just realised pull request #17 pretty much solves the same issue in another way!

[jbarr21]

let's go with #17 instead