Feedback on installation doc

[JulienPeloton]

submodule initialisation

Just after the clone, one needs to get data from submodule:

icare/docs/dev_guide/index.md

Lines 201 to 205 in 5a874b3

	```
	git clone https://github.com/grandma-collaboration/icare
	cd icare/
	virtualenv env
	source env/bin/activate

git submodule init
git submodule update

Troubleshooting

module 'skyportal' has no attribute 'version'

Command ./icare.sh run --clear --init can lead to:

... 
Applying config
Traceback (most recent call last):
  File "<string>", line 1, in <module>
AttributeError: module 'skyportal' has no attribute '__version__'
...

Solution:

rm -r patched_skyportal
./icare.sh run --clear --init

App is launched by nothing appear online

setenforce 0 !