Intercepting Filter in DBDeploy and other tweaks#13

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unmeshjoshi wants to merge 5 commits intotackley:masterfrom unmeshjoshi:master

+482-64

Commits on Nov 18, 2015

Adding support to run validations on migrations to be applied.
unmeshjoshi
committed

Commits on Dec 7, 2015

collecting all ignored exceptions when exception is thrown
unmeshjoshi
committed

Commits on Jan 20, 2016

Adding generic filtering mechanism instead of explicit validations.
unmeshjoshi
committed

Commits on Feb 11, 2016