enable <img title="..." >

The "title" attribute is used for tooltips.
Set -webkit-text-size-adjust to 100% for code

This fixes issue #107, where code and line numbers don't align on iphone.
Merge pull request #926 from omega/omega/107-fix-code-iphone

Set -webkit-text-size-adjust to 100% for code
Merge pull request #925 from karenetheridge/patch-1

enable <img title="..." >