Add "report a bug" link to documentation index

4 jobs for master in 21 minutes and 2 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #357779
test:2.7

00:09:08

73.0%
failed #357780
allowed to fail
test:3.7

00:02:59

 
  Branch
passed #357781
branch_image

00:10:19

 
  Latest
passed #357782
latest_image

00:01:33

 
Name Stage Failure
failed
test:3.7 Test
    
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-11m8hfo_/pyxmpp/
Running after script...
$ rm -fvr ${PIP_CACHE_DIR}/log
Uploading artifacts...
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1