Issue 4044: Search overhaul, part 1

[elzj]

Issue 4044: Search overhaul, part 1

This is just the json generation and indexing bits to send data to the new Elasticsearch cluster, with rake tasks to do a full reindex. We still need to hook it into the callbacks -> redis buffer cycle and create the new search classes.

https://code.google.com/p/otwarchive/issues/detail?id=4044

[coveralls]

Coverage decreased (-37.73%) when pulling 6e402bb on elzj:search_overhaul into 50f9689 on otwcode:master.

[coveralls]

Coverage decreased (-18.33%) when pulling 9a0ffc9 on elzj:search_overhaul into 50f9689 on otwcode:master.

[coveralls]

Coverage decreased (-0.35%) when pulling f5497ca on elzj:search_overhaul into 50f9689 on otwcode:master.

[ariana-paris]

If the index's existence is a requirement, should there be a guard against trying to run this code without an index (i.e. check if it exists and create it if not, for example, or raise an exception?)

[elzj]

If you try, Elasticsearch just tells you that you can't do it. It's one of their less oblique error messages, so I'm not sure it's worth catching it and raising a new one.

[coveralls]

Coverage decreased (-0.37%) when pulling ae0ea64 on elzj:search_overhaul into 50f9689 on otwcode:master.

[coveralls]

Coverage decreased (-0.36%) when pulling ab87444 on elzj:search_overhaul into 50f9689 on otwcode:master.