model method to revoke admin from member
controller method to revoke admin from member
add routes for revoke admin from member of an organization
add revoke action to before_action ":assign_target_user"
add form button to revoke admin from member
add css for revoke admin button
add message for revoking admin from a member
controller spec for revoke admin from a member
feature spec for revoke admin from a member
change css for buttons to be within the box.
add message in English for revoking admin from a member.
change put to patch
change unless to if-else for the condition of member.configurable?.
Merge pull request #81 from root04/saorister/revoke_admin

組織のメンバーから管理者権限剥奪
#53 Create OrganizationSearch
OrganizationSearch

create spec
add search organizations
remove unused file
add kaminari lib
add kaminari lib