Type casting reference matrix fixed.
FEAT: added internal remove-char function for string datatype.
FIX: minor code improvement in insert-char function.
Update README.md

Synchronized the repository to add remark on compiling te console and a contribution section.
FIX: Useless lines deleted
TESTS: Call test for posix, draft
Merge branch 'master' of git://github.com/dockimbel/Red into call
TESTS: Experiments on call tests
Merge branch 'master' of git://github.com/dockimbel/Red into call
FEAT: Call, errors printed to stderr now.
FIX: Call, debug errors on stderr
FIX: issue #765 (Problem with FIND at TAIL of BLOCK!)
FEAT: Improved print-error function
Merge pull request #767 from qtxie/issue765

FIX: issue #765 (Problem with FIND at TAIL of BLOCK!)
Merge branch 'master' of github.com:red/red
TESTS: uncommented test for issue #765
FIX: find/reverse failed when block! and string! at tail.

FEAT: minor code refactoring.
TESTS: update find-test.red
TESTS: added prefix maths op tests to integer-auto-test
FEAT: remainder action support (for integer! and char!).

FEAT: accept eacaped value (%xx) in file name.
FEAT: uncomment tests for remainder.
FIX: Can't handle escaped format (%xx) in file name.

TESTS: Add a test for file!