and not only when the webrunner starts

This bug makes the display of "Running instance..." 2 times instead of one

runner: correctly displays the "run log" after the build step, even if the slapgrid process is very short in time

runner: /viewLog displays "Queue" for Run only if the run_instance option of slapgrid is set to true

bug described here: https://nexedi.erp5.net/bug_module/20140718-1A93B96

in page /viewLog

instead of guessing what's going to happen.
Upgrades on this file are yet to come

Also, return code of Popened-processes are now always read when they finish

Merge branch 'slaprunner-layout' into slaprunner-paas

runner: fix previous commit (case .project file do not exists)

runner: provide "default" project in editor

runner: realpath return a string

(If it is to wait for replication to be effective, is there a need for it
to be done between each clone test?)