Added pruneSteps as a function.
Inital implementation of raxRolesMask transform.
Added maskRaxRoles403 option and added to CLI.
Whoops, need to make sure that @notMatch is sorted.
Whoops, failed to take account @next in header join opt.
Move rax:roles header checks above URI checks.
Whoops, merge next links correctly.
Minor fixes in merge operation.
Initial 403 mask tests.
Whoops, insure IDs are encoded correctly in raxRolesMask.
Init role masked tests.