recommend Bundler and the use of the system Ruby package
install bundler as a user, execute local version
actually install bundler as a user
BUNDLE_BIN is special, use LIBERTREE_BUNDLE_BIN
do not run css-build.sh after installation

The Ramaze application compiles SCSS to CSS on start up.
return 0 to continue after system_user_install

When a user chooses not to run the last option in system_user_install
the function would return a non-zero value, aborting the installation.
provide a list of build-time dependencies
more space around installation commands
shorten introduction

We no longer install any system packages.
add information about db configuration
Clarify usage of PGHOST.
do not export PGHOST

Use the local socket instead (default).
clarify pg_hba.conf configuration
find bundler even it is not installed in ~/.gem
refer to new shell script
use key generation shell script
Merge branch 'master' into xmpp