license stuff and remove absolute paths

Not sure what version of bitbake / oe-core you're using but mine requires a LICENSE and LIC_FILE_CHECKSUM.  I picked the MIT license since it's the default for recipes.

Also made the require in your images to an include and got rid of the absolute path.  Not the right thing but it means I can have my meta-measured some where else in my build.

Let me know what you think.