Update install.php
Update install.php

"Pretty printing" `config.yml` in order to make it editable by humans. `5` is just value which is looking good for me. It produces a `config.yml` like this:

    prevstage:
        - start
        - database
        - github
        - email
    b8:
        database:
            servers:
                read:
                    - localhost
                write:
                    - localhost
            name: phpci
            username: *****
            password: *****
    phpci:
        url: 'http://phpci.my.org'
        github:
            id: ''
            secret: ''
        email_settings:
            smtp_address: ''
            smtp_port: ''
            smtp_encryption: on
            smtp_username: ''
            smtp_password: ''
            from_address: ''
            default_mailto_address: ''

I guess the `prevstage` node can be replaced before writing? If yes I'll prepare that.
Block8/PHPCI,keradus/PHPCI,corretgecom/PHPCI,php-censor/php-censor,ronanchilvers/PHPCI,laszlof/PHPCI,corretgecom/PHPCI,jimmycleuren/PHPCI,mikk150/PHPCI,nevernet/PHPCI,gdseller/PHPCI,andreustimm/PHPCI,mehulsbhatt/PHPCI,juanf/PHPCI,mikk150/PHPCI,keradus/PHPCI,Lechus/PHPCI,mindteam/PHPCI,juanf/PHPCI,tankist/PHPCI,mikebronner/PHPCI,mavimo/PHPCI,keradus/PHPCI,LewisW/PHPCI,ronanchilvers/PHPCI,chtombleson/PHPCI,mseshachalam/PHPCI,ojengwa/PHPCI,mindteam/PHPCI,leadermt/PHPCI,steverobbins/PHPCI,nevernet/PHPCI,tankist/PHPCI,steverobbins/PHPCI,mavimo/PHPCI,Lechus/PHPCI,cooperaj/PHPCI,LewisW/PHPCI,nelsonyang0710/PHPCI,corpsee/php-censor,nelsonyang0710/PHPCI,Lechus/PHPCI,corpsee/php-censor,andreustimm/PHPCI,seshurajup/PHPCI,Block8/PHPCI,ronanchilvers/PHPCI,mehulsbhatt/PHPCI,Topface/PHPCI,chtombleson/PHPCI,mehulsbhatt/PHPCI,php-censor/php-censor,jimmycleuren/PHPCI,rafaelang/PHPCI,wodka/PHPCI,Block8/PHPCI,mseshachalam/PHPCI,nevernet/PHPCI,mikebronner/PHPCI,dwolke/phpci,LewisW/PHPCI,chtombleson/PHPCI,zilionis/PHPCI,nelsonyang0710/PHPCI,dwolke/phpci,onedal88/PHPCI,dwolke/phpci,steverobbins/PHPCI,zilionis/PHPCI,mikk150/PHPCI,tankist/PHPCI,seshurajup/PHPCI,Adirelle/PHPCI,gdseller/PHPCI,corpsee/php-censor,ojengwa/PHPCI,andreustimm/PHPCI,juanf/PHPCI,Coderockr/PHPCI,Topface/PHPCI,mseshachalam/PHPCI,Coderockr/PHPCI,Coderockr/PHPCI,SamMousa/PHPCI,mavimo/PHPCI,onedal88/PHPCI,SamMousa/PHPCI,gdseller/PHPCI,rafaelang/PHPCI,rafaelang/PHPCI,zilionis/PHPCI,jimmycleuren/PHPCI,leadermt/PHPCI,wodka/PHPCI,corretgecom/PHPCI,Topface/PHPCI,seshurajup/PHPCI,Adirelle/PHPCI,onedal88/PHPCI,laszlof/PHPCI,php-censor/php-censor,ojengwa/PHPCI,SamMousa/PHPCI,laszlof/PHPCI,Adirelle/PHPCI,mindteam/PHPCI,ronanchilvers/PHPCI,cooperaj/PHPCI,cooperaj/PHPCI,mikebronner/PHPCI,leadermt/PHPCI