Squashed commit of the following:

commit 0769893d80a1d78e9fddd7617d2bf661bc11ac71
Author: Nick Holub <nikholub@gmail.com>
Date:   Wed Mar 12 15:29:02 2014 -0700

    fix #SPOI-2077 Installer: we need a separate page for hadoop installation directory

commit ecaa9cdf970adb6c7d3a65c0e45c146008c552f6
Author: Nick Holub <nikholub@gmail.com>
Date:   Wed Mar 12 15:27:04 2014 -0700

    fix #SPOI-2077 Installer: we need a separate page for hadoop installation directory

commit 440336dc78807569e20c6fa3bec7ac709a08b534
Author: Nick Holub <nikholub@gmail.com>
Date:   Wed Mar 12 15:20:14 2014 -0700

    fix #SPOI-2077 Installer: we need a separate page for hadoop installation directory

commit ce1f3767d89f4c984125bc2545c9bc2273fd8404
Author: Nick Holub <nikholub@gmail.com>
Date:   Wed Mar 12 15:14:59 2014 -0700

    fix #SPOI-2077 Installer: we need a separate page for hadoop installation directory

commit 068f5706dcb3ce6a792170232e28a243ec892f24
Author: Nick Holub <nikholub@gmail.com>
Date:   Wed Mar 12 15:00:42 2014 -0700

    fix #SPOI-2077 Installer: we need a separate page for hadoop installation directory

commit 39deefedb999cf643cccd9d343bf6d60a98691ed
Author: Nick Holub <nikholub@gmail.com>
Date:   Wed Mar 12 14:15:51 2014 -0700

    fix #SPOI-2077 Installer: we need a separate page for hadoop installation directory
Merge pull request #786 from nickholub/in5_pull

Installer - Separate Screen for Hadoop Installation Directory