Merge pull request #670 from tomasAlabes/master

Ground for contributions
Finding issues instructions in README
getData function to elements
Glow function for set
Fixed error when Raphael undefined
Typos un reference
getElementsByBBox function added
undrag fix of drag array
Corrected typos of documentation
Fixes to merged pull requests
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Fixes to merged pull requests
  Corrected typos of documentation
  undrag fix of drag array
  getElementsByBBox function added
  Typos un reference
  Fixed error when Raphael undefined
  Glow function for set
  getData function to elements
  Finding issues instructions in README

Conflicts:
	make
	raphael-min.js
	raphael.js
	raphael.svg.js
	raphael.vml.js