made all the textual icons bold again
removed the ENCHANTMENT and ARTIFACT layout types. they are card types, but not layout types.
removed 'name' from ColorTheme and Layout
Merge remote-tracking branch 'origin/master'

Conflicts:
	api/src/main/groovy/com/barneyb/magic/creator/api/Layout.groovy
added toHex and fromHex methods to a new ColorUtils class
removed Texture.imageOpacity, as the .opacity property already provides it
called out a null semi-enchantment texture implies the theme just doesn't do it, so it must be handled gracefully
changed to depend on batik-svggen instead of batik-codec
created a 'theme' module and pulled all the theme-y stuff out of the frame.svg PoC into it