[read carefully before decide merge] !!! normalize line endings of src files (#1268)

* all source: prepare to normalize line ending

* all src: normalize line endings

src/ifcbimtester/.gitattributes

@@ -1,53 +0,0 @@
-# ****************************************************************************
-# line endings
-
-# to suppress line ending changes in github, add ?w=1 at link end of a diff
-
-# for more information see
-# FreeCAD source code src/Mod/.gitattributes
-# FreeCAD forum topic https://forum.freecadweb.org/viewtopic.php?f=17&t=41117
-# FreeCAD pull request https://github.com/FreeCAD/FreeCAD/pull/2752
-
-
-# get all used file types
-
-# in a directory in a bash use
-# find . -type f -name '*.*' | sed 's|.*\.||' | sort -u
-
-# search for a specific file ending
-# find . -type f -name '*.ico' 
-
-
-# normalize the line endings of the following files
-# standard files
-*.feature text
-*.html text
-*.ifc text
-*.md text
-*.po text
-*.pot text
-*.py text
-
-
-# files which are human readable
-# but for which it is not sure if normalize is ok
-# svg
-
-
-# binary files
-# ico
-# mo
-
-
-# line endings of the directories commented will be normalized
-# bimtester/** -text
-# examples/** -text
-
-
-# line endings of the directories NOT commented will NOT be normalized
-# Be carefully changes here could affect a lot of files automatically!
-# none ATM
-
-
-# use git to manually correct the file endings
-# git add --renormalize .