Clean up

* split out typhoeus and phantomjs classes
* self-container config based on ostrich
* extract http_utils module
Extract existing checks to extensions
Externalise the pipeline
Oops, lost a message hide
Handle redirects more gracefully
Bump version
Add read me, fix spelling errors
Better URI handling
Add some HTML check extensions

* alt text on images
* titles on links
Externalise ignore check
Add inline CSS checker
Add an empty href checker
Fix descriptive text
Add metadata checker
fix
Add Blinkr tagline
Replace uids with a simple index
Add number of errors detected to heading
Improve report

* Categories
* Severities
* Filter
Hide the spinner a bit earlier :-)