Launch Eclipse and do as suggested in images.
Step 1 :
Follow this image :
Select “Search new features to install” and click next.
Click “New archived site” and select the package or zip file you just downloaded from the above link and click open.
Step 4: Click OK.
Step 5: Check the package if not checked and click next.
Step 6: Check the features you want to install and click next.
Step 7: Accept Terms and conditions and click next.
Step 8: Click finish and when it ask to restart eclipse just click yes.
PS: A lot of howtos are pending. Will Try to finish them asap