Invert order of brew install omero and omero_homebrew.sh

With the recent modifications in homebrew-alt, most dependencies should be handled in the OMERO formula.
Remove Homebrew dependencies from omero_homebrew.sh

With recent changes to the OMERO formula, the pure Homebrew dependency are
directly handled by Homebrew. This script should still check and install the
Python dependencies of OMERO.
Convert deprecated omero_homebrew.sh into python_deps.sh
Strip remaining Homebrew components from python_deps.sh

Update OMERO-homebrew-install to use correct location for dependencies
Add notes about Python package dependencies (Scipy, PyTables)
Add note about the expected current directory
Check for local bin/pip installation before looking in the PATH
Update submodules
Merge pull request #785 from snoopycrimecop/merge/dev_4_4/submodules

Update submodules (dev_4_4)
Merge pull request #764 from sbesson/homebrew_deps

OMERO homebrew dependencies
Fix Group list_users function to allow root id (0) to be parsed
Merge pull request #793 from sbesson/10447_cli_root

Fix Group list_users function to allow root id (0) to be parsed
Merge pull request #783 from jburel/modulo-stable

Modulo stable Merging before we start test refactoring.
Add dependencies when used as a plugin to configuration file.

Define the various dependencies and information when the
client is used a a plugin.
Move user notification to main class.
Remove whitespace in dependencies list.
Handle the fact that the tag can have not child nodes.
Add support for and/or when checking dependencies list.
Adjust warning message depending on the conjunction used.
Indicate when dependencies are used.