TechSmith's powerful Snagit app for capturing and annotating screenshots or websites has been around for a little over a year, having first been reviewed on TUAW in November 2010. Today Snagit (US$49.95) has been updated to version 2.0, expanding the capabilities of the app to a higher level. Screen capture apps like Snagit are extremely popular with bloggers, since they give us the opportunity to capture entire screens or details of apps for review purposes. For example, if I need to grab screenshots of Wirecast screens for a review, I'll click on the Snagit button that floats constantly in the upper right of my Mac screen. That action (or just moving my cursor ov