Fix typo of PROFILE_IMG_URL in README

The README refers to PROFILE_IMAGE_URL, but it is actually called
PROFILE_IMG_URL in the code.
Merge pull request #7 from livinghood/fix-profile-image-readme

Fix typo of PROFILE_IMG_URL in README
Get prev/next page url from pelican instead of creating it manually
Favicon setting implemented
Merge pull request #10 from anhtuann/master

Thanks :-)
Merge pull request #12 from mhalden/pagination

Get prev/next page url from pelican instead of creating it manually