Correct initialisms as suggested by golint

First step to use initialisms that golint suggests,
for example:

    Line 116: func GetHtmlRenderer should be GetHTMLRenderer

as see on http://goreportcard.com/report/spf13/hugo

Thanks to @bep for the idea!

Note that command-line flags (cobra and pflag)
as well as struct fields like .BaseUrl and .Url
that are used in Go HTML templates need more work
to maintain backward-compatibility, and thus
are NOT yet dealt with in this commit.

First step in fixing #959.

parser/frontmatter.go

@@ -151,30 +151,30 @@ func FormatSanitize(kind string) string {
 func DetectFrontMatter(mark rune) (f *FrontmatterType) {
 	switch mark {
 	case '-':
-		return &FrontmatterType{[]byte(YAML_DELIM), []byte(YAML_DELIM), HandleYamlMetaData, false}
+		return &FrontmatterType{[]byte(YAML_DELIM), []byte(YAML_DELIM), HandleYAMLMetaData, false}
 	case '+':
-		return &FrontmatterType{[]byte(TOML_DELIM), []byte(TOML_DELIM), HandleTomlMetaData, false}
+		return &FrontmatterType{[]byte(TOML_DELIM), []byte(TOML_DELIM), HandleTOMLMetaData, false}
 	case '{':
-		return &FrontmatterType{[]byte{'{'}, []byte{'}'}, HandleJsonMetaData, true}
+		return &FrontmatterType{[]byte{'{'}, []byte{'}'}, HandleJSONMetaData, true}
 	default:
 		return nil
 	}
 }
 
-func HandleTomlMetaData(datum []byte) (interface{}, error) {
+func HandleTOMLMetaData(datum []byte) (interface{}, error) {
 	m := map[string]interface{}{}
-	datum = removeTomlIdentifier(datum)
+	datum = removeTOMLIdentifier(datum)
 	if _, err := toml.Decode(string(datum), &m); err != nil {
 		return m, err
 	}
 	return m, nil
 }
 
-func removeTomlIdentifier(datum []byte) []byte {
+func removeTOMLIdentifier(datum []byte) []byte {
 	return bytes.Replace(datum, []byte(TOML_DELIM), []byte(""), -1)
 }
 
-func HandleYamlMetaData(datum []byte) (interface{}, error) {
+func HandleYAMLMetaData(datum []byte) (interface{}, error) {
 	m := map[string]interface{}{}
 	if err := yaml.Unmarshal(datum, &m); err != nil {
 		return m, err
@@ -182,7 +182,7 @@ func HandleYamlMetaData(datum []byte) (interface{}, error) {
 	return m, nil
 }
 
-func HandleJsonMetaData(datum []byte) (interface{}, error) {
+func HandleJSONMetaData(datum []byte) (interface{}, error) {
 	var f interface{}
 	if err := json.Unmarshal(datum, &f); err != nil {
 		return f, err