combined webos and touchpad as webos with optional touchpad flag, added silk flag for silk browser, expanded documentation
added silk browser detection to readme
yet another silk addition to readme
Added description of version field to readme.
Merge branch 'master' of https://github.com/ded/bowser into combine-webos-and-touchpad
Merge pull request #43 from BendingBender/combine-webos-and-touchpad

Combined webos and touchpad detection, added flag silk, updated readme