bash script improvements

- bash_startup improvements (seeing a performance improvement of about
  36ms in parsing the default.ftcommands, also removes external calls to
  sed)
  - use parameter substitution instead of splitting with the IFS when
    reading default.ftcommands
  - escape quotes using parameter substitution instead of sed
  - replace sed in trim with parameter substitution
Merge branch 'bashStartup' into zsh
initial zsh support

Conflicts:
	data/Startup/zsh_startup.in