Add a lexer for Jasmin
.reb is now commonly used file extension for REBOL code
FIX: Issue #985 - REBOL comments
Comments handling fixed in Red language lexer as well.
Added Red language into language listings and including its and REBOL's home URL
Merged in Oldes/pygments-main/issue-985 (pull request #345)

REBOL comments handling fixed
Make requested changes to JasminLexer
Merged in dscorbett/pygments-jasmin (pull request #343)

Add a lexer for Jasmin