Update pip command to install requirements

Without satisfying requirements, kartograph will fail with a `ImportError: No module named tinycss` error.
Merge pull request #14 from christophermanning/patch-1

Update Ubuntu pip command to install requirements
Update index.html
Move README to README.md and update formatting to fix github display
Fix #9 (visual editor) and face projection showcase
Merge pull request #16 from christophermanning/update_readme_formatting

Move README to README.md and update formatting to fix github display
Merge pull request #15 from christophermanning/fix_showcases

Fix #9 (visual editor) and face projection showcase
updated kartograph.js
updated to kartograph.js 0.6.1
documented new 'chunks' option