Add etags-select to vendor
Add pydoc-info to vendor
Add initial customizations
Disable indent tabs mode for C
Use C context line break in C and C++
Add c-eldoc
Enable ANSI colors in compiler output
Add doxygen snippets
Auto-install required packages

Add prelude-require-package to auto-install packages needed by custom
configuration.
Remove unused prelude-customize

Remove the prelude-customize file as the last thing being used in the
file, disabling electric-pair-mode, is now obsolete.  Prelude now uses
the smartparens package.  Try it out for a while to see if it's better
than electric-pair-mode.
Add yasnippet

Upstream prelude removed yasnippet.  Add it back in and configure it to
look in the personal/snippets directory.
Make smartparens brace smarter in C

By default, smartparens open brace would leave the brace at the wrong
indentation level.  Add a post handler for the open brace that
automatically indents the braces properly and leaves the cursor on an
open line in between the braces.  Example taken from the smartparens
wiki.
Use c common hook, enable whitespace

The prelude-c-mode-common-hook doesn't seem to work correctly in the
presence of yasnippet.  Just use c-mode-common-hook directly to apply C
mode customization.  This also re-enables whitespace mode which was
apparently disabled when indent tabs mode was added.