consider other common license files present in projects (#275)

Author: brmassa

src/repo.v

@@ -832,7 +832,11 @@ fn find_readme_file(items []File) ?File {
 }
 
 fn find_license_file(items []File) ?File {
-	files := items.filter(it.name.to_lower() == 'license')
+	// List of common license file names
+	license_common_files := ['license', 'license.md', 'license.txt', 'licence', 'licence.md', 'licence.txt']
+
+	files := items.filter(license_common_files.contains(it.name.to_lower()))
+
 	if files.len == 0 {
 		return none
 	}

src/repo_routes.v

@@ -420,7 +420,7 @@ pub fn (mut app App) tree(mut ctx Context, username string, repo_name string, br
 	mut license_file_path := ''
 
 	if license_file.id != 0 {
-		license_file_path = '/${username}/${repo_name}/blob/${branch_name}/LICENSE'
+		license_file_path = '/${username}/${repo_name}/blob/${branch_name}/${license_file.name}'
 	}
 
 	watcher_count := app.get_count_repo_watchers(repo_id)