Convert v8::Array usage in particles to V4

Change-Id: Ib3c39903bf8f8507d68f94baea81b3bf642ce8f6
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Remove last traces of v8 API and v8 compatibility layer

The debugger and profiler service remain as bigger parts that need to
be ported properly to v4.

Change-Id: I68e72d6db66fe497eb58ed60df417ffe4662d115
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Fix build errors with intptr_t

Simply use qintptr

Change-Id: Ic99d3ea67cc95c5d15bae7080262d997cef9558e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>