Update README.md

Fixed Tutorials and API links
Merge pull request #68 from joshSzep/master

Update README.md
closes #67
rebuilt
Merge branch 'master' of https://github.com/Rich-Harris/Ractive
fixes #75 - allow whitespace before self-closing solidus in tags
fixes #73
tidy up tests a bit
fixes #76
rebuilt
fixes #80
rebuilt
fixes #82
DomPartial was missing firstNode method
fixed schoolboy error - subclass methods that use _super not returning a value
find and findAll convenience methods
Update README.md
Merge pull request #89 from thijsdezoete/patch-1

Update README.md
fixes #88
Merge branch 'master' of https://github.com/Rich-Harris/Ractive