Add another DictionaryList serialization test.
Make redirect handling for download() more specific.
Add preliminary support for the new scheduler system of D-Programming-Language/phobos#1910
fixes compileation of diet-templates with GDC
Add FixedRingBuffer.clear() (avoids warning on DMD 2.066dev as a side effect).
Enable FreeListRef to take qualified payloads.
Avoid heap delegate for runWorkerTask and allow shared delegates.

Also unifies task handling code for worker and non-worker tasks.
Add workaround for strange stdout/stderr initialization issue that breaks the Travis-CI tests.
Avoid use of Variant for run(Worker)Task to enable use of certain classes of types.

Especially some shared qualified types and types with elaborate assignment/destruction resulted in runtime errors before. Now the values are directly stored in a void[] array.
Implement a simple Future!T type. See #490.
Fix compilation on DMD master.
Partially fix compilation on DMD 2.064.
Another DMD 2.064 fix.
FIXUP websockets
FIXUP whitespace