mstask: Implement ClassFactory, DllGetClassObject, and DllCanUnloadNow.

dlls/mstask/Makefile.in

diff --git a/dlls/mstask/Makefile.in b/dlls/mstask/Makefile.in
index b193ae7..2202e22 100644
--- a/dlls/mstask/Makefile.in
+++ b/dlls/mstask/Makefile.in
@@ -6,6 +6,7 @@
 IMPORTS   = uuid kernel32
 
 C_SRCS = \
+	factory.c \
 	mstask_main.c \
 	task_scheduler.c