Fix incorrect headers handling #15

Handling of headers was done incorrectly.

Fixing #15

Use Pug instead of Jade

For background check pugjs/pug#2184.

Add image rendering

@ITsvetkoFF added image rendering. This allows for taking snapshots of pages and save them as images.

Checkout https://github.com/Tomtomgo/phearjs#usage for usage info.

Add page requests and cookies to result

Returned JSON can include requests and cookies generated by web page, by adding get_requests=true and/or get_cookies=true parameters to a request.

Thanks @andersju!

Improve performance under high load

Catch small issues that rarely (but often enough to be a big problem) occur when PhearJS is under high load.

Status page

Added a status page
Fixed favicon
Improved docs

QT memory leak workaround

Added version information on startup
Workaround for memory leak in QT (relevant PhantomJS issue)

Stability release #2

Mainly: PhearJS will return 503 if too many requests are being made at the same time.

Adding stability

Using feedback from users stability in a high load scenario was improved.

Initial release

0.1.0

Update README.md