update embedded script with changes from go_wolips - testing for "." as current dir

Signed-off-by: T Worman <worman@gseis.ucla.edu>
merge in upstream changes that have happened recently
add p2 plugin installer script - embedded with go_wolips.sh
update p2 with executable bits on permissions
- updated URL - now pointing to http://archive.eclipse.org
- commented out P2_URL refs, now including in package
- executing p2 script in same directory go_wolips.sh
Merge pull request #18 from timsquared/master

Fix Golipse with corrected URL and embedded p2 script