[SPARK-12069][SQL] Update documentation with Datasets

[marmbrus]

No description provided.

[dilipbiswal]

@marmbrus Primitive types mentioned twice ? Is it ok ?

[SparkQA]

Test build #46946 has finished for PR 10060 at commit 649541c.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[BenFradet]

I might be mistaken but I think you meant to write "through" and not "though".

[rxin]

It would also be great to expand this slightly and explain what can be inferred automatically right now.

[rxin]

import order

[SparkQA]

Test build #47151 has finished for PR 10060 at commit 3e53a4c.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[gatorsmile]

benifits -> benefits

[SparkQA]

Test build #47356 has finished for PR 10060 at commit 3ff7a46.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[BenFradet]

Is there a word missing between "more" and "about" like information?

[BenFradet]

I made a few comments, but otherwise it's clear.

[marmbrus]

Thanks for the comments!

[SparkQA]

Test build #47366 has finished for PR 10060 at commit 4b51ad7.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.