Installer for 2.0RC2

[ehume]

Double thumbs up, devs.

The new installer has an editable text field where you can type in the
installation directory, and it works fine. Most excellent.

It's a small thing, but you guys made me happy tonight.

An item:

The new installation is appreciably faster than the installation of Fx
1.5.0.7 that it replaced. I uninstalled 1.5 before installing 2.0RC2,
but I did not touch my default profile.

It is also appreciably faster than the installation of the 2.0 nightly
builds installed from zipfiles that I have been using in parallel with
Fx 1.5. Since this is something that has been consistently reported
since The Days of the Phoenix, it's something worth exploring once Fx
2.0 Final is out the door.

But thanks for that installer text field. Good job.