json_last_error_msg() takes 0 arguments
initial tests
Initial tests for FileBody, missing tests for send(), unsure how to cause a truthy  (@readfile(->path) === FALSE)
constant name fix
Skip Test on PHP 5.5+
Skip Test on PHP 5.5+
Add Exception if depth is passed on PHP < 5.5
exception if depth passed on php < 5.5; do not pass depth for php < 5.5
fix expected exception message
testThrowsRunTimeExceptionIfDepth... requires PHP 5.5
Merge pull request #32 from RonnieSkansing/master

unittests for Jsonbody/FileBody and minor fix