Updates square version of logo with v2 series logo.
Updates square version of logo with v2 series logo.

gaurav/phyloref.github.io,gaurav/phyloref.github.io,phyloref/phyloref.github.io,phyloref/phyloref.github.io,phyloref/phyloref.github.io,gaurav/phyloref.github.io,phyloref/phyloref.github.io,gaurav/phyloref.github.io