Update install scripts to work on latest gitolite & ubuntu

[jedahan]

Not sure if the postgres install is safe - but it was needed for the rake to work. Would appreciate independent review.

[tvannahl]

Just tested your debian_ubuntu.sh. Got the following error of the related line:

root@ubuntu:/home/git/gitolite# sudo -u git -H sh -c "PATH=/home/git/bin:$PATH; /home/git/gitolite/install"                                                                                    
use the following full path for gitolite:
        /home/git/gitolite/src/gitolite

I would suggest to use the following line from the manual installation out of the documentation:

cd /home/git
sudo -u git -H mkdir bin
sudo -u git sh -c 'echo -e "PATH=\$PATH:/home/git/bin\nexport PATH" >> /home/git/.profile'
sudo -u git sh -c 'gitolite/install -ln /home/git/bin'

sudo cp /home/gitlab/.ssh/id_rsa.pub /home/git/gitlab.pub
sudo chmod 0444 /home/git/gitlab.pub

sudo -u git -H sh -c "PATH=/home/git/bin:$PATH; gitolite setup -pk /home/git/gitlab.pub"

[jedahan]

thanks @tvn87 , I decided to do a combover of the scripts, replacing them with the section you provided and splitting out steps and adding comments. Testing now.

[jedahan]

Closing until I get this working, then committing as something more logical.