Fix Python download link
Add link to test results indicator page on the wiki
Merge pull request #95 from townxelliot/master

Minor edits
Clean up sample text and links
Add SIMD sample description
Update links for new crosswalk-samples version
Update unwieldy paragraph
Add SIMD sample icon
Add note about minimum version of Crosswalk + arch required for SIMD

Only works on beta Crosswalk on x86.
Add download links to all sample-specific pages