Fiddle with fonts

* Remove `font-family: monospace` override from some qualified selectors

Currently some `pre` and `code` tags use `Menlo,Monaco,Consolas,"Courier New",monospace` (e.g. `pre`s in `Got 5 minutes?`) while other code blocks have `font-family` overriden with just `monospace` (code example in the home page header).

If the intention is to use `monospace` in code blocks, the following style overwriting bootstrap’s style sounds better:

```css
code, kbd, pre, samp {
    font-family: monospace;
}
```

* Refine spelling (uppercase, quotes)

Purely a stylistic change

* Make text-near-logo font identical across uses

“Haskell” alongside the logo uses different fonts between the home page (`Ubuntu`) and navigation bar in inner pages (`Open Sans`). Made all instances use `Ubuntu` as in home page, although I find Open Sans to suit better.