More Pointed, Copointed instances

[RyanGlScott]

I added several Pointed and Copointed instances I'd like to have in the library, namely:

From base:

• Copointed m => Copointed (WrappedMonad m)

From comonad:

• Pointed (Cokleiskli w a)

From containers:

• Default k => Pointed (Map k)
• Pointed ViewL
• Pointed ViewR

From unordered-containers:

• (Default k, Hashable k) => Pointed (HashMap k)

From semigroups:

• Pointed (Option a)
• Default a => Pointed (Arg a)
• Copointed (Arg a)
• Pointed WrappedMonoid
• Copointed WrappedMonoid

From semigroupoids:

• Pointed f => Pointed (WrappedApplicative f)
• Copointed f => Copointed (WrappedApplicative f)
• Pointed f => Pointed (MaybeApply f)
• Copointed f => Copointed (MaybeApply f)

From transformers:

• Copointed f => Copointed (Backwards f)
• Copointed f => Copointed (Lift f)
• Copointed f => Copointed (Reverse f)

[ekmett]

If these are urgent for you let me know and I can push out a release.

[RyanGlScott]

It's not urgent. The reason I'm going around making so many pull requests on your repos is because I'm eventually planning on making a mono-keys package which combines features of your packages (especially keys) with monomorphic equivalents from mono-traversable. There are a lot of instances that one package has but the other doesn't, so I need to get all packages to have the same instances before I get to work.

My next step is to add a bunch of instances to mono-traversable, which could take a while.