Update README.markdown
Merge pull request #18 from pivotal-blueprint/patch-1

Update README.markdown
Support capturing HTTP Authentication - fixes #11
jQuery 2.0 renamed onreadystatechange to onload.
Merge pull request #20 from dark-panda/jQuery-2-0-support

jQuery 2.0 renamed onreadystatechange to onload.
Add README example for testing request parameters.
Grammar fix leftover from the removal of Prototype
Merge pull request #24 from raindrift/patch-1

Grammar fix leftover from the removal of Prototype
Merge pull request #22 from ragaskar/param_expectation_example

Add README example for testing request parameters.
Merge with master