Fix lint errors in models/wiki (just add methods docs)

See #70

models/wiki.go

@@ -46,6 +46,7 @@ func WikiPath(userName, repoName string) string {
 	return filepath.Join(UserPath(userName), strings.ToLower(repoName)+".wiki.git")
 }
 
+// WikiPath returns wiki data path for given repository.
 func (repo *Repository) WikiPath() string {
 	return WikiPath(repo.MustOwner().Name, repo.Name)
 }
@@ -70,6 +71,7 @@ func (repo *Repository) InitWiki() error {
 	return nil
 }
 
+// LocalWikiPath returns the path to the local wiki repository (?).
 func (repo *Repository) LocalWikiPath() string {
 	return path.Join(setting.AppDataPath, "tmp/local-wiki", com.ToStr(repo.ID))
 }
@@ -141,14 +143,18 @@ func (repo *Repository) updateWikiPage(doer *User, oldTitle, title, content, mes
 	return nil
 }
 
+// AddWikiPage adds a new wiki page with a given title.
 func (repo *Repository) AddWikiPage(doer *User, title, content, message string) error {
 	return repo.updateWikiPage(doer, "", title, content, message, true)
 }
 
+// EditWikiPage updates a wiki page identified by its title,
+// optionally also changing title.
 func (repo *Repository) EditWikiPage(doer *User, oldTitle, title, content, message string) error {
 	return repo.updateWikiPage(doer, oldTitle, title, content, message, false)
 }
 
+// DeleteWikiPage deletes a wiki page identified by its title.
 func (repo *Repository) DeleteWikiPage(doer *User, title string) (err error) {
 	wikiWorkingPool.CheckIn(com.ToStr(repo.ID))
 	defer wikiWorkingPool.CheckOut(com.ToStr(repo.ID))