Fixed comment typos
Merge pull request #27 from ygra/patch-1

Fixed a few comment typos
Build
changing drawHTML routine to avoid ie rendering issue
Merge branch 'master' of github.com:thatcher/openseadragon
found an IE specific error in some styles set for collections visualizations
accidently left alwaysBlend global defaul set to true during development.  Looking forward to our new org based repo where I'll be constrained more than my current wild-west repo, sorry.  corrections also to pan constrainment details which came to the forefront while working on collections zoom and panconstraints.  Added new ui feature page to demo basics.