Fix bug #26
Merge pull request #27 from rwwagner90/master

Updating the README a bit
Version 0.10.1
New Leaflet CDN, from cdnjs.

HTTPS has a valid certificate.
Cluster.Size clatification

I thought Cluster.Size was related to how many markers would be merged with each cluster, but it is about its dimension and margin ratio. 

I also tried to improve PruneClusterForLeaflet's constructor documentation.
Merge pull request #31 from brunolellis/master

Cluster.Size clarification
ignoring some dir/files and closing css link tag
Merge pull request #33 from brunolellis/master

ignoring some dir/files and closing css link tag