Added CONTRIBUTING.md
Updated testing doc
[#154] Fixed map items
Fixed typo
Merge pull request #170 from WouterJ/add_contributing

Propose CONTRIBUTING.md
Merge pull request #173 from dantleech/testing

Updated testing doc
Merge pull request #181 from rmsint/block_varnish_fragments

[WIP] Block: cache - add config to enable esi
Reverted commit 9795d68
Merge pull request #182 from WouterJ/revert_181

Reverted commit 9795d68
Block: cache - remember context