add --delete flag

This makes more sense, and better matches behavior of "real" shared directories behave (say in virtualbox).
Merge pull request #194 from vasili-zolotov/master

add --delete flag to rsync command
Simple ELB support

Adds functionality of adding and removing instances from AWS ELB.
ELB must exist in the first place.

This partially fixes mitchellh/vagrant-aws#53
Fix formatting of en.yml
Merge pull request #238 from rtyler/elb-rebase

Elb rebase
Fix syntax errors by inserting return characters in appropreate positions
Merge pull request #244 from mizzy/fix-syntax-errors

Fix syntax errors by inserting return characters in appropreate positions
Just a small correction
Bumping fog version
Fix unclosed begin/end block.
Added missing 'end'.
Merge pull request #254 from seanmcl/master

Add missing 'end' in errors.rb.
Merge pull request #253 from krames/fog_bump

Bumping fog version
Merge pull request #251 from gustavovnicius/master

Just a small correction
Update the 0.5.0 changelog entry with some recent changes
Bump to 0.5.0