Added 'did you mean'
Follow-up on review
Splitted function for Swagger integration
Follow-up on review
Follow-up on review
Add support for Swagger.

This PR brings in swagger-express [1] which allows you to documents your APIs in your code (controllers)
Unfortunately wordnik's swagger module seems abandoned and none of the available options are particularly good.
swagger-express is the only one that I found that allows you to document your API from within the code which hopefully means
that devs can keep the API docs up-to-date more easily.

I've also updated the static swagger files to the latest release (2.0.3

[1] https://github.com/fliptoo/swagger-express
Merge branch 'swagger' of https://github.com/simong/libraries-gateway into swagger-prep
Merged with @simong's swagger branch
Merge pull request #92 from Coenego/did-you-mean

Did you mean functionality
Also show the classmark in the availability table
Fixed broken thumbnail image issue
Merge pull request #114 from Coenego/thumbnail-fix

Fixed broken thumbnail image issue
Merge branch 'master' of https://github.com/CUL-DigitalServices/libraries-gateway into aquabrowser-availability
PR Follow-up
Swagger integration
Merge pull request #113 from timdegroote/aquabrowser-availability

Also show the classmark in the availability table
Update the find-a-resource page searchbox styling
Merge pull request #116 from timdegroote/find-a-resource-style-update

Update the find-a-resource page searchbox styling
Merge pull request #115 from Coenego/swagger-prep

Swagger integration