Add some cellType and columnType docs

[RobbieTheWagner]

I did some destructuring as well, for consistency of not using Ember., but destructuring instead.

[taras]

💯 thank you!

[RobbieTheWagner]

No problem @taras! Trying to help out where I can 😄

[offirgolan]

@rwwagner90 thanks for taking the time to document the cell and column types, I think it looks great 😺! In terms of styling, Im not really a fan of declaring Component as a constant (especially if there is no other constants in the rest of the file).

[RobbieTheWagner]

@offirgolan I just try to destructure whatever I can. Is there a reason you particularly do not like doing so with Component?

[offirgolan]

Honestly, its nothing more than of a personal preference / pet-peeve

[RobbieTheWagner]

@offirgolan I'm just not sure what makes component special. I thought the standards were you should destructure everything out of the Ember namespace that you can rather than using Ember.Component Ember.Route etc. I'll be glad to change it back if you'd like though.

[offirgolan]

Thanks @rwwagner90