Inheritance more than one level seems to not work

[deepakkt]

I have three templates

Template A
Template B
Template C

B inherits from A and C inherits from B.

If there is a block in A which I don't specify in C, but try to render the block passing C, it throws a block not found exception.

But it works if I pass in B instead of C.

[jribbens]

Yes, this has just bitten me.

[clokep]

I think that #56 might fix this, but would be curious for more real world testing!

[clokep]

Duplicate of #12.