RF: import readline early for systems where this must be done before …

…visual

It isn't actually clear to be why (only) some systems crash if readline is
imported by sound (later on in the script) but reports are that importing
earlier fixes the problem

psychopy/__init__.py

@@ -47,3 +47,8 @@
 
     from psychopy.tools.versionchooser import useVersion, ensureMinimal
 
+# import readline here to get around an issue with sounddevice
+# https://github.com/psychopy/psychopy/issues/2230
+# https://github.com/psychopy/psychopy/issues/2344
+# https://github.com/psychopy/psychopy/issues/2662
+import readline