reorganize tags in PEG file
modular code complete (add references in function params)
Merge branch 'optimize'
fix access to vars
fix global vars use
fix test
update doc
more features in the COMPATIBILITY matrix
optimize the print command
add die/exit special functions
add exit/die as normal functions
reorganize features
add lazy check for conditions
use conditions mixed with statements
call a function contents in a variable
concat with booleans and numbers
magical constants
change vars names
include/require code from other files
accept include / require old syntax without parens