WIP - Initial support for OpenACC syntax

Made OpenMP sentinel less greedy
Added initial support for OpenACC directives

WIP:
Some clauses not matching properly.
Directives with optional arguments may not match properly.

Author: Jeff Larkin

package.json

@@ -76,6 +76,13 @@
           "source.fortran.free"
         ]
       },
+      {
+        "scopeName": "source.openacc",
+        "path": "./syntaxes/openacc_lang.json",
+        "injectTo": [
+          "source.fortran.free"
+        ]
+      },
       {
         "language": "fortran_fixed-form",
         "scopeName": "source.fortran.fixed",