Fixed #267 -- updated controller web UI.
Merge pull request #272 from opdemand/267-web-ui

Fixed #267 -- updated controller web UI.
Updated Chef version to 11.6.2.
Updated to new Berksfile format to silence deprecation warnings.
Created provider-specific installation docs, refs #227.
Merge pull request #283 from opdemand/227-provider-docs

Fixed #227 -- Created provider-specific installation docs.
Merge pull request #280 from opdemand/271-chef-version

Fixed #271 - updated Chef version to 11.6.2.
Reverted Berksfile format.
Updated sadly hard-coded JS nav code for new docs, refs #283.
Clarify that Dockerfiles are not yet supported directly.
Updated several python packages.
Specified package version 0.6.4 for Docker, not virtual package.
Updated EC2 AMIs in all regions for security updates.
Merge pull request #289 from opdemand/236-refresh-amis

Fixed #236 -- updated EC2 AMIs in all regions for security updates.
Updated prepare-image-* scripts for minor optimizations.
Updated project version strings to 0.2.0.
Updated Ruby gems dependencies.
Switch master to v0.2.1
Default login/register URL to http:// schema if it's not specified.
Moved "Terms" section back to top level nav in docs.