Add an example on what the syntax could be
Update deps
Add Response asserter
Add Element asserter
Add Crawler asserter
Wires asserters to WebTestCase
Improve atoum & travis  configuration
Add headers assertion
Ad atLeast/atMost assertions & improve hasChild
Update README.md
CS Fix
Merge pull request #8 from jubianchi/custom-asserters

Improved test syntax with fluent API