Write a test suite to exhaustively test the library to check any errors

[roarkanize]

The current test suite is very naïve and therefore makes it hard for errors to appear due to its simplicity. Ideas for a more exhautive test suite could be:

• Using randomly generated INI files (could work along with the tokenizer rebuild explained in #1)
• Having more than one test INI test file, each with varying complexity (the current one is very simple)