Initial commit of new commands

Added:
 * GetGroup
 * GetGroupPolicy
 * GetInstanceProfile
 * GetRole
 * GetRolePolicy
 * AccountAliases
 * GroupPolicies
 * GroupsForUsers
 * InstanceProfiles
 * InstanceProfilesForRole
 * RolePolicies
 * Roles
 * UserPolicies
 * Users
Revert "Initial commit of new commands"

This reverts commit 9b7c26f79df9d8f70bc04732972b9571ecb83417.

Commited to wrong branch.