Account for versions of OSX in between major releases

E.g. 10.9.x, 10.8.x
Merge pull request #41 from RapGenius/master

Account for versions of OSX post 10.9
Upgrade Rails to 3.2.17

Fixes #42
Merge pull request #44 from articulate/rails-3.2.17

Upgrade Rails to 3.2.17
Added step to load DB before starting server

Resolves #43
Merge pull request #46 from toolbear/patch-1

Added step to load DB before starting server
add some check for linux
install gcc ruby in linux(archlinux, ubuntu, fedora, ...); fix tar command
silent which
bugfix detect cmd should be >/dev/null 2>&1
update from github boxen