feature request: config parser

Let it have its own simple ini-like format:

```
[section]
key=value
another_key="long value" # comment
# another comment

[another-section]
key="another value"
another_key=2000
whitespace = "does not matter"
newline
= "does not matter, too"

[flags-section]
flag1=true
flag2=false
flag3=on
flag4=off
flag5=1
flag6=0

[more-advanced-section]
array1=["arrays", "have", "values", "of", "the", "same", "type"]
array2=[
"arrays",
"can",
"make",
"use",
"of",
"newlines"
]
```