Started working on package-level documentation

regex/doc.go

@@ -0,0 +1,9 @@
+/*
+Package regex implements an NFA-based engine to search for
+regular expressions in strings. The engine does not use backtracking,
+and is therefore not vulnerable to catastrophic backtracking. The regex
+syntax supported (a variation of Golang's) is specified in the Syntax section.
+
+*/
+
+package regex