add GA pixel

Author: adriannuta

CODE_OF_CONDUCT.md

@@ -44,4 +44,6 @@ Project maintainers who do not follow or enforce the Code of Conduct in good fai
 
 ## Attribution
 
-This Code of Conduct is adapted from the Contributor Covenant, version 1.4, available at http://contributor-covenant.org/version/1/4.
+This Code of Conduct is adapted from the Contributor Covenant, version 1.4, available at http://contributor-covenant.org/version/1/4.
+
+[![Analytics](https://ga-beacon.appspot.com/UA-114439919-1/manticoresoftware/manticore/CODE_OF_CONDUCT.md?pixel&useReferer)](https://github.com/manticoresoftware/manticore)

README.md

@@ -91,5 +91,7 @@ Refer to  [CONTRIBUTING.md](https://github.com/manticoresoftware/manticore/blob/
 ## License
 Manticore Search is release under GPLv2, for more information check [COPYING](https://github.com/manticoresoftware/manticore/blob/master/COPYING)
 
+[![Analytics](https://ga-beacon.appspot.com/UA-114439919-1/manticoresoftware/manticore/README.md?pixel&useReferer)](https://github.com/manticoresoftware/manticore)
+
 [slack-url]: https://slack.manticoresearch.com/
 [slack-badge]:  https://img.shields.io/badge/Slack-join%20chat-green.svg

TESTING.md

@@ -50,3 +50,6 @@ $ ctest -C Debug -I 1,10,1
 
 If you are fixing a regression you must add or update a functional test which failed prior to the pull request got merged and passed fine after the pull request got merged.
 
+
+[![Analytics](https://ga-beacon.appspot.com/UA-114439919-1/manticoresoftware/manticore/TESTING.md?pixel&useReferer)](https://github.com/manticoresoftware/manticore)
+