Pull request: 1 clarification and 2 small amendments to README.md and tests.js

As we briefly discussed, I've made a couple of suggested alterations to two files:

1. README.md:
- Amended './resources/tests.js' to './test/tests.js' in index.html code snippet 
- Changed 2 spelling mistakes
- Added one clarification to the equal() assertion explaining the parameters

2. test/tests.js
- Removed the third parameter in the equal() assertions; this was 'true' for all of them and according to the qunit.js documentation, this optional third parameter should actually contain a message (although this in itself is not super useful if the test is named properly, unless there are *lots* of equal() assertions in one test). -> http://api.qunitjs.com/category/assert/

I hope these are helpful!
Ines