Test coverage for backend

[oleksiyp]

Hi,
seems your project lacks good test coverage.

And that's perfect match for my needs.
I want to test-drive my new mocking library MockK and by the way I can do full coverage for your project.

Cheers!

 * - not testable
 + - tested

 [*] ├── Application.kt
 [+] ├── ApplicationPage.kt
     ├── dao
 [+] │   ├── ThinkterDatabase.kt
 [*] │   ├── ThinkterStorage.kt
 [*] │   ├── Thoughts.kt
 [*] │   └── Users.kt
 [+] ├── Delete.kt
 [+] ├── Index.kt
 [*] ├── Locations.kt
 [+] ├── Login.kt
     ├── model
 [*] │   ├── atoms.kt
 [*] │   └── responses.kt
 [+] ├── PostThought.kt
 [+] ├── Register.kt
 [+] ├── UserPage.kt
 [+] ├── Utilities.kt
 [+] └── ViewThought.kt

[oleksiyp]

Requesting review and merge.
@cy6erGn0m @hhariri @orangy @yole @elizarov
Thanks in advance!