Change SetJSON to correctly handle pointer args (#63)

This fixes an issue with not grabbed `goriakindex` tags when we pass the pointer to SetJSON method.

Before this commit the behavior was:
- call SetJSON with the pointer to a struct which has `goriakindex` tag.
- under the hood, the method determinates kind of passed value as `ptr` and doesn't try to find the field with tag.
- data are silently written into a bucket, without a secondary key.

In this commit added an extra check on pointer and data passed by pointer handled in the same way as data passed by value.
Test case included into the commit.

fix(module) try again (#62)

fea(module) add Go module support (#61)

Update readme version to 3.2.1. Added notice about required riak-go-c…

…lient version

Update README.md

Bugfix for conflict resolution in GetRaw()

Merge pull request #48 from zegl/riak-security

#47 - Added support for password based authentication

Merge pull request #48 from zegl/riak-security

#47 - Added support for password based authentication

Release v3!

Update badges branch