Consider textContainerInset

Without this, the scroll is sometimes a little off. I’m not 100% this
is correct, as I don’t fully understand the relation between
contentInset and textContainerInset. That said, my app works much
better with this change.
awakeFromNib support
Merge pull request #16 from fillito/awakefromnib

awakeFromNib support
Merge pull request #9 from hpique/master

Don't scroll while setting the text or selection manually
Merge pull request #10 from hpique/textContainerInset

Consider textContainerInset
update readme
update podspec
method signature is not required as we use fast forwarding.
code style
add social
Merge pull request #2 from steipete/master

Update from steipete:master