Increase allowed JSON body-size to 1Gb

Previous limit of JSON document was body-parser default of 100kb, in emails app, we have mail where the html content is bigger than that, so we need to increase this value.
Couchdb max_document_size is 4Gb, 1gb seems to be a good middle ground.
Merge pull request #96 from aenario/master

Increase allowed JSON body-size to 1Gb
Added: .DS_STORE to gitignore
Added: support for getting the number of results for a search
Added: support for field types for indexation
Added: support for mapped values for indexation
Fixed: typo
Fixed: PR comments
Fixed: the index/clear-all route couldn't be called
Built