OmeroCpp: remove Boost requirement

IceUtil::generateUUID is still present in Ice 3.5.
Refactor CmdCallbackI into ImportCallback class

In order to prevent multiple IMPORT_DONE notifications,
the anonymous CmdCallbackI subclass has been turned into
an inner class which can carry state, specifically whether
or not an import response has already been produced.
Better synchronization of CmdCallbackI subclasses

onFinished() was being called from the ctor of CmdCallbackI
due to the call to poll. This was before the "container"
field of ImportCallback had been setting meaning nothing
was available for processing. CountDownLatches have now
been added to the superclass to allow proper control of
ordering, and the call to poll now happens in a background
thread so that onFinished() does not block.
Merge pull request #1190 from will-moore/delete_chgrp_MIF_bugs_May20th

Delete chgrp mif bugs may20th
Show Activities panel with new errors
Fix merge conflict resolution bugs
Merge pull request #1180 from sbesson/rebased/develop/homebrew-clean-install

Clean /usr/local Git repository before calling brew doctor (rebased onto develop)
Add function to retrieve plane information from an image
Fix skipping issue and show failure.
Install genshi before OMERO/Bio-Formats installation using Homebrew

This commit should fix the failing Homebrew job on the develop branch. Genshi
is required on this branch for both formulas but cannot be installed by
Homebrew itself. Installation is managed in the installation script itself
(independently of the testing mode status since it is required for all users)/
Fix failure during scanning.
Append virtualenv site-packages to PYTHONPATH

Even if virtualenv is activated, virtualenv packages are not properly
recognized by Homebrew formula. This should fix this behaviour by preprending
the virtualenv site-package to the PYTHONPATH within the script.
Improve result display of MIF.
remove space.
Fix div-by-zero on fake files
Failed chgrp/delete MIF has 'REFRESH' data
Set annotation list in OmeroImageServiceImpl (Fix #10904)
Fix unbound variable
Merge pull request #1201 from bpindelski/data-dir

Fix omero.data.dir ignored in current develop branch (see #10828)
Remove number of files at folder level.