Revert "Added installation BASH script. README.md updated and typos fixed."

This reverts commit 84db84ccbcc87b121dd7ac00cc882421bf260db3.
Revert "Revert "Added installation BASH script. README.md updated and typos fixed.""

This reverts commit 333bd20105ef98d04b1e8ebbc4380d1d3397d4ab.
Missing install script added plus git ignore file
Missing install script added plus git ignore file