orgmode: Add support for console (shell-session) pygment lexer
orgmode: Add support for console (shell-session) pygment lexer

Pygment has a colorizer for shell session avalaible as "console" or
"shell-session":

https://pygments.org/docs/lexers/#pygments.lexers.shell.BashSessionLexer

This simple change enables processing for these languages for
colorized console transcripts that I use often in my blog.

getnikola/plugins,getnikola/plugins,getnikola/plugins