Merge pull request #179 from s0undt3ch/develop

Reevaluate the `PKI_DIR` since the `SALT_ETC_DIR` was redefined
Spelling mistake in the usage() doc

Noticed a tiny spelling mistake in the usage() doc in the bootstrap.sh
Merge pull request #180 from bruce-one/patch-1

Spelling mistake in the usage() doc
SLES 11 SP3 support added to bootstrap script

Needed to tweak the script because of lsb_release output changed
to 'SUSE LINUX' instead of 'SUSE'
Merge pull request #181 from aboe76/sles_sp3_support

SLES 11 SP3 support added to bootstrap script
Copy files instead of moving is asked for. Fixes #182.

If `BS_KEEP_TEMP_FILES=1` is found on the environment, the script will copy the files instead of moving them.