changed soap methods to return json dumped value to avoid soap parsing errors
properly filtering ips credential
passing in EC2 credentials in format that iaas_manager accepts if not provided by the tools
taking in json for add_instances call
Merge pull request #290 from shatterednirvana/with-set-params-taking-json

AppController SOAP functions return JSON
Making nginx locations for secure/nonsecure URLs use regular expressions by adding ~
Merge pull request #297 from jovanchohan/nginx_fix

Making nginx locations for secure/nonsecure URLs use regular expressions...