Allow using non-strings as Bundle contents.
Allow using non-strings as Bundle contents.

Ensure those will be passed through until Environment._normalize_source_path() is called. See #71.

scorphus/webassets,0x1997/webassets,glorpen/webassets,heynemann/webassets,florianjacob/webassets,wijerasa/webassets,heynemann/webassets,glorpen/webassets,aconrad/webassets,scorphus/webassets,john2x/webassets,JDeuce/webassets,aconrad/webassets,john2x/webassets,JDeuce/webassets,glorpen/webassets,heynemann/webassets,aconrad/webassets,florianjacob/webassets,wijerasa/webassets,0x1997/webassets