Added @elseifrole and @elserole Blade directives.

[asdullahsiddique]

I have added 2 more blade directives to improve the usability of @role Blade directive:

• @elseifrole as you can guess you can add an elseif statements to @role
• @elserole directive which translates to an else.

@role('admin')
    <p>This is visible to users with the admin role. Gets translated to 
    \Entrust::role('admin')</p>
@elseifrole('staff')
     <p>This is visible to users with the staff role. Gets translated to 
        \Entrust::role('staff')</p>
@elserole
     <p>This is visible to all the other roles./p>
@endrole

Cheers, Sid.

[asdullahsiddique]

Checks were failing because of PHP version in composer.lock but now it's okay. @Zizaco

[matteoterzi]

Great!