* Add QuantizedConcat

* Remove unused variables and add check for size of mins and maxes vector

* Resolve conflicts

* Merged with master and addressed some PR feedback

* Maxpool and Avgpool fusions. Exclude Q from conv+relu fusion

* Remove single-user check from fusions

* Quantized concat fusion

* workaround: do reshape sinking by default

* style fix

* check scales for QuantizedConcat

* use compare_constants

* remove stale comment

* Handle all concat cases from arg size 2 to 6

* addressed feedback