1.0.2: opentx-lua-running-graphs

* Update WIDGETS/graph.lua
- switch param `padding`(p) to `margin`(m) for outer spacing
- add `padding`(p) for inner spacing
- make use of calcWidgetZone() func

* Add TELEMETRY/memgph.lua
- display used mem stats

* RemoveTELEMETRY/exmpl1.lua

* Update build files

* Update README.md