Add semantic versioning contraint
Merge pull request #87 from hpatoio/master

Nginx doc review - #72
Merge pull request #88 from FriendsOfSymfony/semver

Add semantic versioning contraint
make things private when possible
Add reference targets for bundle docs
Merge pull request #90 from FriendsOfSymfony/docs-links

[WIP] Add reference targets for bundle docs
Merge pull request #89 from FriendsOfSymfony/protected-private

make things private when possible
Add doc links
explain why we also purge in vcl_miss
Merge pull request #91 from FriendsOfSymfony/purge-clarification

explain why we also purge in vcl_miss
Use short code block syntax where possible
Start Varnish through Process component (fix #85)
Merge pull request #92 from FriendsOfSymfony/process

Start Varnish through Process component
Use ProcessBuilder (fix #93)
Merge pull request #94 from FriendsOfSymfony/process-builder

Use ProcessBuilder
cache tag invalidation needs to escape for regex
improve vcl comment
Merge pull request #95 from FriendsOfSymfony/fix-tag-escaping

cache tag invalidation needs to escape for regex
Run Sphinx in strict mode on Travis

Sphinx warnings should make the doc build fail on Travis.
Merge pull request #99 from FriendsOfSymfony/strict_sphinx

Run Sphinx in strict mode on Travis