NEW: Add 'get' method to make arbitrary requests
Merge remote-tracking branch 'vladif/make-any-request-to-solr' into v0.3.x-alternative83
Alternative implementation for the #83 suggestion.
Making it not-conflicting with the #88 implementation by renaming get --> handleGet()
Adding the handlePost to complete the use-case behind this
Not returning self but rather the request since that seems the standard pattern in v0.3.x
adding tests for generic handleGet and handlePost