ltrim should return OK
Merge pull request #109 from macb/bugfix/ltrim_output

ltrim should return OK
Expire returns 1 and 0, not true and nil.
Merge pull request #110 from macb/bugfix/correct_expire_value

Expire returns 1 and 0, not true and nil.
Depend on rspec 3
Migrate .rspec options into ruby config
Enable both should and expect syntax for now
Remove pending sort spec as it got implemented recently
Fix usage of `be_true` and `be_false` for rspec 3

They now become `be true` and `be false` respectively, otherwise rspec expects the object to respond to `#true?` or `#false?`.
Merge pull request #112 from guilleiguaran/rspec-3

RSpec 3 support (& fix tests under rbx-2)

Fixes #108 and #111
Relax redis dependency.
Allow srem with multiple params
Merge pull request #114 from andrehjr/srem-multiple

Allow srem with multiple params
Implement #BITCOUNT
Add spec for UTF8 strings
Added encoding utf-8
Merge pull request #115 from andrehjr/add_bitcount

Implement #BITCOUNT
Update README to mention support for 3.0+
Bump version to 0.5.0
Remove unsupported rubies and update aliases