Language statistics bar for repositories (#8037)

* Implementation for calculating language statistics

Impement saving code language statistics to database

Implement rendering langauge stats

Add primary laguage to show in repository list

Implement repository stats indexer queue

Add indexer test

Refactor to use queue module

* Do not timeout for queues

vendor/github.com/src-d/enry/v2/enry.go

@@ -0,0 +1,16 @@
+/*
+	Package enry implements multiple strategies for programming language identification.
+
+	Identification is made based on file name and file content using a seriece
+	of strategies to narrow down possible option.
+	Each strategy is available as a separate API call, as well as a main enty point
+
+		GetLanguage(filename string, content []byte) (language string)
+
+	It is a port of the https://github.com/github/linguist from Ruby.
+	Upstream Linguist YAML files are used to generate datastructures for data
+	package.
+*/
+package enry // import "github.com/src-d/enry/v2"
+
+//go:generate make code-generate