TOML backend doesn't fully support TOML

[tealeg]

Currently, the TOML support that was added supports simple Key/Value configurations but doesn't handle some of TOML's more complex structures.

We should:

• Define test cases for all TOML features
• Ensure that the TOML backend can pass those cases.

The spec for TOML can be found here: https://github.com/toml-lang/toml

[vdkotian]

Is this issue still open. I would seek to contribute for this project.

[eliastor]

BTW some cases added in #45 with commit after merge to master

[rmcodor]

still open?

[tealeg]

@rmcodor yes, there are still some ways in which TOML isn't supported.