Add querying capabilities. Fixed some minor verbage typo in the spec. Unit tests for new methods are yet to come.
Update README.md and add some more method comments (using the YARD format: www.yardoc.org).
Add Specs for #count query method.
Add test for #count_unique method
Fix typo in README.md
Add custom method to transform a hash into query parameters. For Ruby 1.8.7 compatibility (it does not support URI::encode_www_form)
Remove all caching code.
Fix incorrect example of Keen.count using target_property when it's not necessary.
Merge pull request #5 from ifeelgoods/topic_keen_query

[Feature] Add Querying capability to Keen Client