Add v2 examples for Vector

[EmilyBourne]

Add Vector examples for version 2 of GFTL. Also fix a typos in the documentation.
Fixes #238

[tclune]

It looks good - thank you for putting so much effort into this. And my apologies for forgetting to look at this over the weekend.

I've requested a few minor changes - see the inline comments.

I'm wondering if the next step is to add some more in-source documentation describing just what each example is doing. "This example creates a container of type ... and then adds 3 elements and prints the 2nd element." Something like that.

And then maybe a README.md file per directory that gives a one sentence summary of each example?

[EmilyBourne]

It looks good - thank you for putting so much effort into this. And my apologies for forgetting to look at this over the weekend.

No problem. Happy to help :)

I'm wondering if the next step is to add some more in-source documentation describing just what each example is doing. "This example creates a container of type ... and then adds 3 elements and prints the 2nd element." Something like that.

I have added some comments to the examples

And then maybe a README.md file per directory that gives a one sentence summary of each example?

That sounds like a good idea. I have added a basic README here: 9bbb883

[tclune]

That sounds like a good idea. I have added a basic README here: 9bbb883

Looks good.