py2/3 compatibility

the fsl namespace in other projects. This breaks python 2 support, but can be
fixed by touching fsl/__init__.py

and hashbang into every .py file.

log.memory .. all the __init__ stuff will make its way over to FSLeyes.

flirt) from frozen fslpy.

created, so AtlasPanel was not being initialised with atlas list.
Fixed, and also added some notes for possible future method to
keep track of changes to FSLDIR (and solve my disabled 'Add standsard'
menu item issue)..

tool). Re-worked fsl GUI tool intiailisation so that arguments are
parsed on the wx.MainLoop - trying to get the FSLeyes splash screen
shown ASAP.

argument parsing. This is used by FSLeyes to display the splash screen
ASAP on startup.

the main frame.

'--fullhelp' which shows help for all options.

running. GLModel has to implement GLObject.ready() method.

instead of before the main loop. This is because forcing widget
refreshes whilst running off the main loop is more difficult than it
should be.

fsl/version.py. The setup.py modification has not been tested.

module.

set immedialely, if possible. Still does not refresh fsleyes/open
standard action, but better than before.

compiled pyinstaller executable, or as a python script.

has been done so that the SceneOpts classes can copy them without
having to import the slicecanvas/lightboxcanvas modules, which would
then force import of all the OpenGL/GLObject stuff.

on startup.

control over tool layouts - not finished yet. Toolbar can no longer add
labels - it is the responsibility of the user to provide labelled
tools. Toolbar does have a utility method to label a tool though.

Little bugfixes to atlas panel and colour bar panel.

already set). Related: atlases module does not give up on first import
if FSLDIR is not set - it checks on each function call.

Display instance.

2. Sprinkled some more debug statements about the place

3. fsl/__init__ configures root logger, instead of 'fsl' logger.