Merge pull request #4276 from minrk/config-extend

Support container methods in config
Merge pull request #4345 from takluyver/pexpect3-interface

Make irunner compatible with upcoming pexpect 3.0 interface
Merge pull request #4350 from minrk/winhpc-unicode

WinHPC launcher fixes
remove attic documents from source code
remove unused files
README now includes description of make targets
update help to include html_noapi target
remove do_sphinx file
removing ipython.el, not updated since 0.11
bugfix. parse of non python code returns a tuple as expected
Fixing comments on equation justification.
return an specific error for non python
Merge pull request #4311 from mgaitan/load_symbol_extractor

%load -s to load specific functions or classes
Merge pull request #4154 from ellisonbg/mathstyle

Center LaTeX and figures in markdown
Merge pull request #4342 from abhinav-upadhyay/unnessary-variable-assignment

Return value directly from the try block and avoid a variable
Restored ipython profile locate dir and fixed typo. (Fixes #3708).
Add failing test for gh-4361
Don't assume that SyntaxTB is always called with a SyntaxError

Closes gh-4361
PayloadManager: Fix docstring.
Add regression test for #1349