v2.3.1

NBInclude v2.3.1

Diff since v2.2.0

Merged pull requests:

• switch to github CI (#23) (@stevengj)
• added in_nbinclude (#24) (@stevengj)
• add nbexport function (#25) (@stevengj)
• nbexport should check for valid ipynb file before writing output (#31) (@stevengj)

Closed issues:

• Spurious undefined variable error (#16)
• Compat with Compat (#19)
• Is there a way to make PyPlots not show up? (#20)
• A way to check if code is running in NBInclude (#21)
• add "nbexport" to convert notebook to .jl file (#22)
• TagBot trigger issue (#26)
• Do not include the __main__ (#29)
• HELP! nbexport: using input arguments in incorrect order completely deletes/empties the Notebook (#30)