Fixed missing identifying of last tokens when hitting eof.
Changing lexer status during parsing of strings
Added a nice system to access standard grammars
Fixed error reporting of already defined properties and functions
Wip for descriptions of priority for tokens in grammars
Fixed recognition of elements past strings.
Fixed unneeded multiple load of modules actually being the same
Merge branch 'new_engine' of falconpl.org:falcon into new_engine
Added a sieve method to filter an array in place
WIP for grammar parsing
WIP for grammar parsing