Merge pull request #68 from mitfik/master

Improvements
Merge pull request #69 from mitfik/master

Improve README
Merge pull request #70 from mitfik/master

Fix test for find_first
Merge pull request #72 from mitfik/master

Add sync acl
updated gemspec
updated gemfile.lock
Merge pull request #76 from mitfik/master

Update readme
Host was not being considered for the temporary url generation method, nor passed down to called methods
Passing down the host was not necessary
Forgot to change the host/bucket according to the situation
Bumping version
Cleaning documentation
Merge pull request #77 from andresf/master

Support for virtual-host style
Merge branch 'master' of github.com:qoobaa/s3
Added objects_with_prefix method
modified Bucket#objects method to include prefix option
added tests for prefix objects
Merge pull request #78 from suhastech/master

Add a feature to query subfolders (or path prefix)
bumped version
bumped version