Reduce clutter by setting up separate sections for rainbow-delimiters
and smartparens.
Add rainbow-delimiters-mode to essential hooks instead of enabling it
globally.

Apparently, global-rainbow-delimiters-mode is an obsolete function as of
version 1.3.12 of rainbow-delimiters.el.
Put custom code for determining applicability of Org Speed Keys into
separate function.
Record current position when starting to navigate to previous positions
in the mark ring via C-u C-SPC.
Define commands for wrapping ARG words after point with parens,
double-quotes, and single-quotes without having to set up a region.

Without ARG, the commands default to wrapping one word after point.
Use IPython as the default interpreter for Python shell buffers.
Set up file associations for .odg files.
Apply org-mode markup to strings preceded by a hyphen.
Stop allowing two newlines inside delimiters for org-mode markup.
Add basic configuration for dot and ditaa code blocks in org-mode.
Add dot, ditaa, and plantuml to list of languages that can be evaluated
in org-mode buffers.