Added links to Amazon for purchase of book.
Added link to Amazon Student sign up page for free two day shipping
of book if needed.
Rename 1.0.5 SASS include

CodeKit does not like '.' periods in file names. The _1.0.5.scss file
has been renamed removing the periods.
Added Tuts+ PSD course link

Also added class photo
Week 2 homework assignment information updated.
Week 2 extra credit info added
Added additional resources and avatar instructor contact links.
Week 2 homework info added.