Update CustomerQuickstart.md

Add info about google account and xmpp funxtionality
Update nullmailer.md

Note for other settings
Merge pull request #9 from pauloxnet/patch-1

Update CustomerQuickstart.md
Merge pull request #10 from pauloxnet/patch-2

Update nullmailer.md
added nano,htop and emacs to distros
wheezy distro
fixed wheezy
addedruby 1.9.1 to wheezy
fix in 'Linking containers' curl commands
Merge pull request #12 from StefanoOrdine/master

fix in 'Linking containers' curl commands
Update README.md
Update CustomerQuickstart.md
Add mercurial to debian based distros
Merge pull request #14 from xrmx/addmercurial

Add mercurial to debian based distros
added locales for precise
Update CustomerQuickstart.md
added readline and tmux to precise
added strace to precise
added libsasl2-dev to precise
fixed #11