Standart column types, foreign keys, default constructor in Kotlin

[Aqluse]

DBFlow Version: 4.1.1
Issue Kind (Bug, Question, Feature): Bug, Question

Description:
I'm using Kotlin to create database
I've got 3 issues (don't know if I should separate them).

1. Standart column types.
I use ByteArray type in a table. I got:

Error:error: Columns cannot be of array type.

But 3rd item allows it:

https://agrosner.gitbooks.io/dbflow/content/TypeConverters.html

2. Non-nullable Foreign Key

Error:error: ========== :Foreign Keys must be nullable. Please remove the non-null annotation if using Java, or add ? to the type for Kotlin.==========

Is it really such a problem to have non-nullable foreign key?

UPD: As I took a point, after reading some of the same issues had been asked here before, I should put @nonnull annotation instead of non-nullable Kotlin type to see right behavior of this.

3. Default constructor for data class*

Error:error: *==========class com.raizlabs.android.dbflow.processor.TableValidator :Table XXXX must provide a visible, default constructor.==========

I have data classes for all tables in database with column as parameters. Looks like one's in example
https://agrosner.gitbooks.io/dbflow/content/KotlinSupport.html
Got errors for all of tables.

[agrosner]

please file 3 separate issues.

1. that's a bug.
2. see changes to foreign keys in 4.1 #1459
3. Make sure you provide default values for all fields.

[agrosner]

1. is in develop now.