FIX: better handling of Red script nested inclusions. Should fix or help fix #385.
FIX: #system and #system-global relative include paths rewritting routine was only processing the first include path found.
FIX: include path starting with %~/ are now correctly processed as absolute paths.
FEAT: minor code optimization.
FIX: some nested paren expressions in macros where sometimes corrupted and resulted in the line header info being exposed in the source code, producing a compilation error.
Merge branch 'fix-385'
FIX: removed useless rule for any-string! (because it's not processed by INTO).
FIX: issue #412 (Crash on out of scope word)
DOCS: fixed typo in code comment.
FIX: issue #414 (Interpreter corrupts argument passing)
FIX: wrong jumping pointer calculation for POKE action in `actions/poke`.
FIX: avoid FIND and SELECT actions change input series index.
FIX: stack adjustments for FIND action.
FEAT: preliminary support for path! and set-path! evaluation from the interpreter.

Currently supported datatypes in paths (by interpreter): word!, get-word!, integer!.
FIX: temporary fix for #416
FIX: issue #417 (Can't load multi-line string with REBOL header)
FIX: final fix for issue #416 (Interpreter corrupts argument passing on path access)
FIX: issue #415 (Compile crash on nested functions)
FEAT: moved inner code for interpreter's path evaluation into a sub-function.
FIX: additional fix for issue #416.