jp (blog, common): moved and improved edit code from blog: - a new "common" module is there for code commonly used in commands - moved code for editing item with $EDITOR there - moved code to identify item to edit there - aforementioned fontions have been made generic - a class BaseEdit is now available to implement edition - HTTPS links are handled (only HTTP links were working before) - item can be use if all previous methods fail (url, keyword, file path).

Use this module to temporary store files that need to be integrated to other
projects such as Wokkel.

For example, the changeset that introduced this folder adds RSM (XEP-0059)
support to Wokkel. The files in sat.tmp.wokkel are imported over the initial
wokkel files from sat.plugins.__init__.py