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/go-oniguruma/.travis.yml

@@ -0,0 +1,20 @@
+dist: trusty
+language: go
+go:
+  - '1.11.x'
+  - '1.12.x'
+
+env:
+  global:
+    - LD_LIBRARY_PATH="/usr/local/lib":${LD_LIBRARY_PATH}
+    - GO111MODULE=on
+    - ONIGURUMA_VERSION='6.9.1'
+
+before_install: # install oniguruma manually as trusty has only ancient 5.x
+  - sudo apt-get install -y dpkg # dpkg >= 1.17.5ubuntu5.8 fixes https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1730627
+  - wget "http://archive.ubuntu.com/ubuntu/pool/universe/libo/libonig/libonig5_${ONIGURUMA_VERSION}-1_amd64.deb"
+  - sudo dpkg -i "libonig5_${ONIGURUMA_VERSION}-1_amd64.deb"
+  - wget "http://archive.ubuntu.com/ubuntu/pool/universe/libo/libonig/libonig-dev_${ONIGURUMA_VERSION}-1_amd64.deb"
+  - sudo dpkg -i "libonig-dev_${ONIGURUMA_VERSION}-1_amd64.deb"
+script:
+  - go test -v --cover -race