refactor smal => mxsmal

mxsmal/README.txt

@@ -0,0 +1,16 @@
+
+Simple Matrix Application Library
+=================================
+
+sub libs:
+ - pymxutils: matrix cli utils
+ - mxsmal: the lib itself
+ - smbl: simplematrixbotlib compat layer experiments (if any)
+ - demobot: simple demo bot
+
+install: pip install .
+
+usage:
+  - run `smalsetup <matrixid>` in an empty dir.
+  - start the bot `demobot`.
+  - simple demo bot. no further configuration required