add code to support form categories in config bundles
first version of form categories on launcher screen as buttons
change category buttons to be fake buttons
fix landsscape layout of the launcher activity
add a generalised survey forms list activity
start to delete unnecessary files
tidy up a number of resources
update license info for new year
show message when no forms are available for a specific category
add code to display category icons
add default category icon and caching of category icons
reinstate check for Serval Mesh software