add describe_tags api support
add instance spec utility function, support app env, .config anf .json
partually ransomr commit b8a4aced842499a12cd41a752de6a8b5260fe661
drop instnace_spec support
fix: create_tags with default config
Handle errors attempting to get instance meta-data.
Fix return of update config
merger with upsteram
Add UTF-8 support by using Erlang's unicode application
fix: add create_tags with default_config
fix: remove sasl from erlcloud (client app desides on loggin fw)
Merge pull request #25 from talko/config_errors

Handle errors reading credentials from ec2 metadata
Merge pull request #26 from eleostech/utf8-support

Add UTF-8 support by using Erlang's unicode application
Merge pull request #27 from fogfish/master

minor fixes on api
added first batch of VPC functions;
changed extract_ip_permissions to not die because of a non-interned imcp atom;
updated delete_security_group to accept either a groupId or groupName;
updated extract_security_group to populate vpc_id and group_id props;
added ec2_simple_query/4 to mirror ec2_query/4;
defined a new type, filter_list(), used to pass describe_* options; and,
added list_to_e2_filter funs
implemented describe_route_tables
implemented create_route_table and delete_route_table
create_route and delete_route implemented
implemented associate_route_table
hacked in a way to associate a VPC sec grp to a new instance
updated create_security_group to allow for the creation of VPC security groups
modified authorize_security_group_ingress to deal correctly with VPC sec grps