pixoorest: /sendtext has no text path element

[andysecker]

• In pixoorest.py, the /sendtext/... route is registered without any <text> path segment
• Expected: the REST endpoint should accept the message either as a path parameter (e.g. /sendtext/<string:text>/...) or as a query/body
  parameter (e.g. ?text=...), and pass it through to pixoo.send_text_at_location_rgb(...).
• Actual: text is never provided, so the endpoint is non-functional

(Apologies if I've missed something)

[SomethingWithComputers]

Good catch! I think you might've found something I overlooked - I'll have a look at this and fix it up after the holidays ^^!