Update scala, scalatest, scalacheck, rojoma-json, macro-paradise

Mostly just clearing out deprecation warnings due to the MustMatchers
package change, but there is one place in PathTreeBuilderImpl where a
change in macro-paradise meant an actual fix had to happen.

Reviewed-by: marc.millstone@socrata.com
Update to apache httpcomponents 4.3

Reviewed-by: marc.millstone@socrata.com
Don't ignore exceptions when writing via an HttpServletResponse's Writer

Reviewed-by: marc.millstone@socrata.com
Curator is now an Apache project instead of a Netflix one

Reviewed-by: marc.millstone@socrata.com