Porting to via creation in master branch (target: v6)

Know issues

 - Unable to delete VIA (since The old method - used in 5.1 - don't
   work anymore)
 - Via are invisible after plugin run. Need to save and reopen file to
   see them

README.md

@@ -1,9 +1,19 @@
 # This branch is the plugin for development version of KiCad
 
+
 Please select the right branch according your KiCad version:
  - master for development version of KiCad
  - V5.1 for KiCad version 5.1.*
 
+# Know issues
+
+ - Unable to delete VIA (since The old method - used in 5.1 - don't
+   work anymore)
+ - Via are invisible after plugin run. Need to save and reopen file to
+   see them
+
+
+
 # Some KiCad plugins in Python
 
 Thoses plugins must be copied inside KiCad's python plugins