v1.18.1

Changelog

5b45392 Use new Dockerfile name for build command
0e364fc Merge pull request #37 from coveo/rebuild-image-if-changed
c0043b9 Merge pull request #40 from coveo/allow-local-image
a918d74 Update README.md
f5b01b2 Merge pull request #39 from coveo/fix-config-overwrite
7b5ebb2 Calculate the md5 checksum for the files in the build folder
f7c612c Add option to use a local image
9720b11 Remove TGFConfig ref. Configs were not being overwritten correctly Also glide update
20bf75c Merge remote-tracking branch 'origin/master' into rebuild-image-if-changed
71abddd Merge pull request #38 from coveo/refresh-image
e7bfbff Always check the refresh timeout on images. Also refresh built images
07ee1a1 Fix test. Test value should contain the hash
a47d0d3 Add hash to image tag in order to rebuild when the instructions change