Primary key may not be called "id"

[Brice1827]

Especially on existing databases, some primary keys are not called id.
createMultiple function could take a third parameter to indicates primary key, with default value "id".

[terabytesoftw]

You have time for a PR.

[Brice1827]

I will try

[Brice1827]

I can't git pull: "ERROR: Permission to yii2-extensions/dynamicform.git denied to Brice1827". I'm not very familiar to github, may i nedd some particular rights?

[mtangoo]

PR #3

[mtangoo]

Since this is a mojor issue for people with non id PK, I have made release 1.0.1