Download ant-contrib using Ivy.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@13785 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
Build for ImageJ2 Updater on Windows.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@13786 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
Move ivy.xml out of toplevel.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@13787 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd