Update the format and comments of the "version_data" that is used to create the links on main index page.
Update the format and comments of the "version_data" that is used to create the links on main index page.

mpouttuclarke/cdap,hsaputra/cdap,hsaputra/cdap,chtyim/cdap,anthcp/cdap,hsaputra/cdap,mpouttuclarke/cdap,chtyim/cdap,hsaputra/cdap,anthcp/cdap,caskdata/cdap,caskdata/cdap,chtyim/cdap,mpouttuclarke/cdap,caskdata/cdap,caskdata/cdap,caskdata/cdap,anthcp/cdap,mpouttuclarke/cdap,anthcp/cdap,caskdata/cdap,anthcp/cdap,chtyim/cdap,mpouttuclarke/cdap,hsaputra/cdap,chtyim/cdap,chtyim/cdap