add title attribute to buttons

[jangxyz]

I couldn't agree more with issue #18, as someone who thought the same thing.
I didn't know my documents were saved in localStorage and can always be accessed in my browser. Only if I knew it earlier I would've loved it more :)

So here's a simple patch, just adding title attributes to button tags I see in the index.html file

[ianstormtaylor]

Hey @jangxyz nice idea, and sweet avatar too :p

Could I just get you to change the labels to read like this:

Your Documents
Write Mode
Read Mode
New Document
Delete Document

Very happy to merge this one in!

[jangxyz]

done :)

[ianstormtaylor]

Booyah!