v1.2.0

• Fix target ordering to be the same as the user entered
• Don't use CONFIG_PATH os var, rename to RELX_CONFIG_PATH, fixes #241
• Add escript emu args to speed up start time
• Add support for excluding applications from the release, {excluded_apps, []}.
• Extended Start Script: Expose rpc and rpcterms functionality from extended bins script
• Similar to rebar's config script, append a .script suffix to the provided relx config that is evaluated and can possibly change values in the original config
• Nodetool: Treat rpcterm args as a string not a list of elements
• Remove system libs from tarball if system_libs set to false
• Handle the renaming of the boot script to start.boot in basic bin script
• Extended Start Script: Add unpack option to install escript
• Extended Start Script: Provide a pid command to facilitate retrieving the VM's process
• Tar: Render overlay filenames for tar archive
• Extended Start Script: Use CODE_LOADING_MODE in extended bin script
• Fixes for user defining specific erts to include in release