I dont see you defining the nested grid in the above piece of Code. Where have you grouped 8 columns here ??refer slide #29 here http://www.slideshare.net/GabrielWalt/aem-responsive to achieve the nested grid.

Check you settings.xml in maven folder or .m2 folder to see if there are any repo configured in there

Then you should do rollout config in the livecopy. 

are you using the same name for the page locale and i18N localeex: If you have create a language node called 'de' in page, i18N should also have a same node name 'de' and not de_DE

It is already released.. you can refer the same here [1] [2][1] https://helpx.adobe.com/experience-manager/using/creating-touchui-validate1.html[2]http://adobeaemclub.com/custom-color-picker-component-in-granite-ui-in-aem-6-1/

It looks like, we need that login-token which is created by AuthenticationHandler. Let me debug further and let you know If I could figure out something

That could be the potential reason ! thanks for sharing.

Have defined 'Blueprint'.What you have created is the creating a 'live copy' from an existing site which doesnt mean that the parent site you have selected to create live copy becomes blueprint.To defiine 'Blueprint'1. Go to http://localhost:4504/miscadmin#/etc/blueprints2. Create 'New Page'. Give t...

Looks like you can create your own rules. refer [1] for the same[1] https://docs.adobe.com/docs/en/aem/6-1/administer/sites/translation/tc-rules.html

There is not OOB to do the job for you. If its done accidentally and one time job, then I would suggest you to go and delete it manually