Integration release

[loleg]

This PR currently contains patches from #244 with additional library upgrades.

[loleg]

Issues preventing build from succeeding:

--- FAIL: TestUser (4.26s)
    user_test.go:64: 
        Unexpected non-nil/non-zero argument at index 1:
        	<*errors.errorString>: &errors.errorString{s:"authority missing"}
FAIL
FAIL	github.com/ProxeusApp/proxeus-core/storage/database	4.300s

[loleg]

We have a possible fix, but now (possibly due to a library change) I am confronted with another error in my local tests:

ERROR: crypto/aes: invalid key size 26
goroutine 1 [running]:
runtime/debug.Stack(0x27, 0x0, 0x0)
	/usr/lib/golang/src/runtime/debug/stack.go:24 +0x9f
runtime/debug.PrintStack()
	/usr/lib/golang/src/runtime/debug/stack.go:16 +0x25
github.com/ProxeusApp/proxeus-core/storage/database.TestMain.func2(0x103f960, 0x1540070)
	/home/oleg/Localdev/Proxeus/proxeus-core/storage/database/common_test.go:62 +0xd9
github.com/ProxeusApp/proxeus-core/storage/database.TestMain(0xc0002fe100)
	/home/oleg/Localdev/Proxeus/proxeus-core/storage/database/common_test.go:70 +0x27d
main.main()
	_testmain.go:63 +0x165
FAIL	github.com/ProxeusApp/proxeus-core/storage/database	0.011s

Update - this was due to configuration issue, a warning for which has now been added.

[loleg]

The API tests are failing due to an issue in https://github.com/ProxeusApp/node-crypto-forex-rates
I suggest closing this PR so we can get a fresh version up in master and continue looking into it with a fresh branch.

[loleg]

I have tried to disable the areas of CI that are failing - for me without clearly identifiable cause - in the latest commit. Adding warnings in the log (via Makefile) that we need to put in more work here. And starting a branch where I'm trying to fix or at least better understand the issue: https://github.com/loleg/proxeus-core/tree/api-debugging

[tafonina]

we should remain the logic with hide key

[loleg]

I quickly tested and this line breaks the process. It is not needed to hash the key again at this point, as far as I can tell.