[mod] get rid of searx/brand.py

Removes module searx/brand.py and creates a namespace at searx.brand.

This patch is a first 'proof of concept'.  Later we can decide to remove the
brand namespace entirely or not.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

setup.py

@@ -7,10 +7,8 @@ from setuptools import find_packages
 import os
 import sys
 
-# required to load VERSION_STRING constant
-sys.path.insert(0, './searx')
-from version import VERSION_STRING
-import brand
+from searx.version import VERSION_STRING
+from searx import brand
 
 with open('README.rst', encoding='utf-8') as f:
     long_description = f.read()