Remove use of pipelined.

It's not thread safe.
Bump version.
Use setex to set expiry with one call
Setup gemspec and Gemfile
Remove unneccessary defaults
Merge branch 'master' of https://github.com/crystalcommerce/redis-session-store into pull-request-1

Conflicts:
	Rakefile
	lib/redis-session-store.rb
Remove use of pipelining, it's only a single command now.
Fix bug where AbstractStore's default options were being overwritten.
Add destroy method.
Remove unneeded code for base64 encoding/decoding.
Rescue Errno::ECONNREFUSED errors on destroy() (and not all of them).
Pass in redis options to redis
Add nil value check to #destroy
Merge remote-tracking branch 'modcloth/master' into bmarini

Conflicts:
	lib/redis-session-store.rb
	redis-session-store.gemspec
Merge pull request #1 from modcloth/bmarini

Getting this fork up to date with all accumulated patches