Merge pull request #891 from thiagofm/master

Gem release for 0.7.1
Revert 0df712cd5baefd7ef8fe0d351dbb0dbe216a0d50
Fix regression in 0df712cd5baefd7e

-- 0df712cd5baefd7ef8fe0d351dbb0dbe216a0d50 introduced a regression
   for removal of uploads. We need to handle the case were the
   image identifier is empty, but remove_image is set.
Merge branch 'master' of https://github.com/mattolson/carrierwave
Merge pull request #892 from mattolson/master

Fixes #884
Revert "Revert "changed after_destroy with after_commit ... :on => :destroy""

This reverts commit a5cc1c0ab5eb4e87985b6217ca24fdbd913f4fa3.
Update history for v0.7.1
Support for non-Amazon S3 storage solutions
Deprecated :fog_endpoint, changed doc

Left code for fog_endpoint in place to stay backwards compatible.
Recreate specified versions only
added support for Rackspace authenticated URLs
Merge pull request #906 from div/recreate_single_version

Recreate specified version only
Merge pull request #908 from mikian/master

Support for Rackspace Cloud Files Temp URL
Merge pull request #897 from basho/master

Support for non-Amazon S3 storage solutions
Remove autoload, closes #910
Don't force mime-types, mini_magick, or rmagick, applies to #911
Still need to raise if attempting to load, #911
Only require fog if it's available (needed after removing autoload), closes #912
Test on MRI 2.0.0 allowing failures
Update readme