lua, bw luac for some small memory bw radios

* Add precompiled lua for some bw radios

* Update README.md with info on pre-compiled file for bw radios

Author: brad112358

lua/README.md

@@ -6,6 +6,8 @@ This folder contains Lua scripts which may be used to change the Tx module and c
 
 [mLRS-bw.lua](mLRS-bw.lua) is for radios with black and white screens
 
+[mLRS-bw-luac.lua](mLRS-bw-luac.lua) is for some radios with black and white screens which report "not enough memory" with the mLRS-bw.lua file.
+
 Please see the [documentation page](https://github.com/olliw42/mLRS-docu/blob/master/docs/LUA.md#mlrs-documentation-mlrs-lua-script) for install and usage details
 
-***Note***:  If you receive a "not enough memory" error, you can try reducing the file size by running the code through a Lua minifier tool such as the one [here](https://mothereff.in/lua-minifier) and install the minified version as a workaround.  Please also report this to the mLRS developers.
+***Note***:  If you receive a "not enough memory" error, please try the mLRS-bw-luac.lua file.  You can also try reducing the file size by running the code through a Lua minifier tool such as the one [here](https://mothereff.in/lua-minifier) and install the minified version as a workaround.  If neither solution works, please report this to the mLRS developers.