Adding getters/setters to AnimComposer

[rkraneis]

• add getters and setters that should be there just for symmetry reasons
• add missing javadoc (also on existing methods)

[stephengold]

Looks good to me. Thank you for your contribution to JMonkeyEngine!

[MeFisto94]

Small note: A proper title (Adding getters/setters to AnimComposer) or something would've been more clear.
removeCurrentAction is what we needed for the SDK as well (jMonkeyEngine/sdk@b56a3fa)

[Ali-RS]

Can you please add documentation on those methods as well?

[rkraneis]

Can you also add Javadoc on those methods, please?

Yes, will do. What is the policy in regards to authorship in source files? I'd change the class comment
from

/**
 * Created by Nehon on 20/12/2017.
 */

to

/**
 * {@code AnimComposer} is a Spatial control that allows manipulation of
 * armament (skeletal) animation.
 * 
 * @author Nehon
 * @since 20/12/2017.
 */

[Ali-RS]

I have no idea about it, but I guess it might be better to do it in a separate PR.

[stephengold]

I'm not aware of any policy, only practice.

Adding an "author" tag is fine. JMonkeyEngine usually does not use "since".

Personally, I don't like seeing "code" tags in javadoc. The context usually makes them redundant.

[MeFisto94]

Personally, I don't like seeing "@code" in javadoc. The context usually makes it redundant.
If something that'd be @link or @see though and would make more sense like that.

[rkraneis]

In regards to documentation: I tried to keep it close the the already existing one. If there's differing guide lines, I can of course overhaul the whole class ;-)

[Ali-RS]

Looks fine to me, thanks

[Ali-RS]

If there is no objection, I am going to merge this PR in next 24 hours.

[stephengold]

OK. Just remember to use "Squash and merge" instead of "Merge commit" please.