Don't distribute tests and build tools w/ bower

When installing with bower, this repo includes a bunch of files that aren't really necessary for use as a JS lib. Using the ignore option, these files can be excluded from the package.

```
12k   ./nuget
7.7M  ./tools
56K   ./dist/min
280K  ./dist
52K	  ./js/phone-codes
212K  ./js
84K	  ./qunit
8.4M  .
```