general
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- change lua module names
- change TeX macros prefixes
- check for lua name conflicts ('module' used in mods)
- check for macros starting with \luatex
- write test files
- reload check, declaration, luatex test
- import/update doc
- fix Makefile: test files are source, not runfiles
- make tests cleaner: \begingroup\expandafter\ETC.
- handle catcodes for Plain

regs
----

- reload check, declaration, luatex test
- issue a warning if etex not loaded
- handle catcodes for Plain