Who was Meera Bai?

Read the following passage and answer the following questions:    
        
Love for the Lord        
This is part of a song attributed to Mirabai:    
    
I will build a funeral pyre of sandalwood and aloe;        
Light it by your own hand        
When I am burned away to cinders;        
Smear this ash upon your limbs.        
... let flame be lost in flame.

In another verse, she sings:        
What can Mewar's ruler do to me?
If God is angry, all is lost,        
But what can the Rana do?