Enable more sorted set specs for redis 3.0.2
zrem removes multiple members from a sorted set

Fixes #51.
Bump version to 0.4.2
add test case for adding an array of two pairs to a sorted set
Fix incorrect check in zadd array arguments

We were presuming if the arguments array had two elements then it was [2, "value"], but [[2, "value"], [3, "value2"]] are also valid arguments. We now check that the first element isn't an array if there's two elements in the arguments array. Fixes the spec in the previous commit.
Merge branch 'bugfix-array-arguments-for-zadd'
Support passing a list of pairs to HMSET.
remove unnecessary parens
Merge pull request #56 from jeffday/hmset_list_of_pairs

Support passing a list of pairs to HMSET.
add ZCOUNT alias
use method_missing and respond_to create upcase method_name
change write methos to support upcase method
change write method to support ruby 1.8.7
Merge pull request #58 from zlx/master

https://github.com/guilleiguaran/fakeredis/issues/57
Prevent raising errors on calling zrank() / zrevrank() with non-existing
keys
fix coding styles (#59)
fix use of temp vars
Support for ltrim with negative start (max set size)
Added argument errors for mset and sadd commands
Merge pull request #62 from pyromaniac/additional_errors

Added argument errors for mset and sadd commands