Use direct inclusion, not submodules, to bring Javelin into Phabricator

Summary:
Submoduling is slightly convenient for developers but hellishly difficult for many users. Since we make about a dozen updates to Javelin per year, just include the source directly.

Even if we run `git submodule status` more often, this creates additional problems for users with PATH misconfigured.

Fixes T2062 by nuking it from orbit.

Test Plan: Loaded site, browsed around. Grepped for references to submodules.

Reviewers: btrahan, vrana

CC: aran

Maniphest Tasks: T2062

Differential Revision: https://secure.phabricator.com/D4581

scripts/install/install_rhel-derivs.sh

@@ -138,8 +138,6 @@ else
   (cd phabricator && git pull --rebase)
 fi
 
-(cd phabricator && git submodule update --init)
-
 echo
 echo
 echo "Install probably worked mostly correctly. Continue with the 'Configuration Guide':";

scripts/install/install_ubuntu.sh

@@ -81,8 +81,6 @@ else
   (cd phabricator && git pull --rebase)
 fi
 
-(cd phabricator && git submodule update --init)
-
 echo
 echo
 echo "Install probably worked mostly correctly. Continue with the 'Configuration Guide':";

scripts/install/update_phabricator.sh

@@ -28,7 +28,6 @@ git pull
 
 cd $ROOT/phabricator
 git pull
-git submodule update --init
 
 
 ### RUN TESTS ##################################################################