Update the links to PEP 480 and relocate the figures to a separate directory

Relocate the figures to separate directory so that the figures can be easily moved to python.org.
Update Vlad's email address.
Remove obsolete figures from the root directory and fix typographical error in figure1's file path
Merge pull request #10 from vladimir-v-diaz/master

 Update the links to PEP 480 and relocate the figures to a separate directory