futhark-mode.el: Better highlighting.
futhark-mode.el: Better highlighting.

+ Accept user-defined operators.
+ Also highlight tuple field accesses.

diku-dk/futhark,HIPERFIT/futhark,ihc/futhark,HIPERFIT/futhark,diku-dk/futhark,HIPERFIT/futhark,ihc/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,ihc/futhark