Merge pull request exercism#7 from kytrinyx/recognize-haskell

Thanks!

Author: mikegehard

src/exercism/submission.go

@@ -9,6 +9,7 @@ var testExtensions = map[string]string{
 	"clojure": "_test.clj",
 	"python":  "_test.py",
 	"go":      "_test.go",
+	"haskell": "_test.hs",
 }
 
 func IsTest(filename string) bool {

src/exercism/submission_test.go

@@ -14,6 +14,7 @@ var isTestTests = []struct {
 	{"bob_test.clj", true},
 	{"bob_test.py", true},
 	{"bob_test.go", true},
+	{"bob_test.hs", true},
 	{"bob.rb", false},
 }