Normalize

First stab at normalizing the CSS, rather than resetting.

- Removing the reset caused almost no visible issues, except for default list padding/margin
- Moved some `normalize` code in to the sections where the rest of the attribute is defined

Resolves #151 
Am I the devil if I keep those extends on one line?
```
.h1 { @extend h1; }
.h2 { @extend h2; }
.h3 { @extend h3; }
.h4 { @extend h4; }
.h5 { @extend h5; }
.h6 { @extend h6; }
```

It goes against the styleguide, but it's so pretty.