Changed use of "==" operator to Class.isAssignableFrom method

[Hopding]

Fixes #513. This PR changes use of == operator to Class.isAssignableFrom method in Layer.java.

[coveralls]

Coverage decreased (-0.009%) to 83.114% when pulling 77889c9 on Hopding:robust-classifier-type-comparison-513 into bec5f6f on numenta:master.

[cogmission]

@Hopding Hi, what I usually do at this point is follow the coveralls link and review the classes there that can use some "coverage", and create new tests until coveralls is happy. Something we all go through I'm afraid because coveralls isn't perfect?

[Hopding]

@cogmission Ah, I'm afraid I hadn't realized the Coveralls check failed. Thanks for bringing that to my attention. I'll take a look and fix it as soon as I get a chance.

[Hopding]

Haven't forgotten about this. Been busy, but should have some time for this soon 👍

[cogmission]

No worries. I have lot's going on personally too, so I can relate...

[coveralls]

Coverage increased (+0.08%) to 83.208% when pulling ed46d0e on Hopding:robust-classifier-type-comparison-513 into bec5f6f on numenta:master.

[coveralls]

Coverage increased (+0.09%) to 83.211% when pulling ed46d0e on Hopding:robust-classifier-type-comparison-513 into bec5f6f on numenta:master.

[Hopding]

@cogmission There, should be all better now 👍 My apologies for the delay.

[cogmission]

@Hopding No need to apologize, I knew you'd get around to it. Nice Tests!