make sure '&' is used as separator char.

`http_build_query` relies on arg_separator.output by default.
If this is changed in the current execution context, the method
may produce unexpected behavior.
use string argument.
Merge pull request #128 from 0x20h/fix-http-build-query

Thanks
skip redis tests if connection fails.

Additionally added the ability to
configure the redis instance as environment variable
in phpunit.xml.
Merge pull request #129 from 0x20h/skip-redis-tests

skip redis tests if connection fails.
Add Heroku service
Merge pull request #135 from thomaswelton/heroku

Add Heroku service
Using string as header not array. Works locally but AppEngine expects a string. PHP.net examples also use strings.
Merge pull request #141 from shimberger/patch-1

Using string as header not array. Works locally but AppEngine expects a ...
Cleanup
Started writing services tests but got drunk
Fixed drunkenness @bwoebie
*/me puts @PeeHaa on the wall of shame*
\o/
Added abstract service tests
Added bitbucket tests
Added Etsy tests
Added fitbit tests
Added flickr tests
Added tumblr tests