Stricter temperature validation

* Restricts input to digits and `.`
* Sets min and max temperature to 0 and 99.99
* Normalises input to two decimal places, e.g.:

```js
.1042 => 0.10
9.8 => 9.80
```
updated version code and db url for v0.0.11 build
Merge pull request #11 from tlvince/refactor/form-validation

Stricter temperature validation
background contact list update.
Merge branch 'upstream/master' into feature/update-contact-list
latest v0.0.11