Added script signature support

Signed-off-by: Brandyn A. White <bwhite@dappervision.com>
Added signatures with base64 encoded parameters (more compact)

Signed-off-by: Brandyn A. White <bwhite@dappervision.com>
Merge pull request #24 from swgreen/brandyns_branch

Major improvements to GlassKeyboard
Minimal change to look for intent extra and run something if present.