bashrc: cleanup, options tweaked, new function to test terminal fonts.
git: new aliases, ignores for github
new config file: exuberant-ctags
vimrc: TODOs, comments
.Xresources: urxvt changed resource urlLauncher to url-launcher
.bashrc: fixes and reorg.

- fix sudo completion
- add gnutime output format
- PS1 refactored
- grepc lists assembly source files
- other generic cleanups.
.vimrc: update TODO items.

- new TODO item for custom highlighting.
  (I would like to highlight my own '@todo' doxygen tags)

- new TODO item for clang-complete plugin (I plan to use it later).

- removed section on folding, I only use the standard shortcuts.
gitconfig: new commands ignored and filehist <file>
bashrc: functions lsize and dirsize take arbitrary number of arguments
cleanups
bashrc: support for clippy. Needs external scripts, and cowsay.
vimrc: don't set fileencoding[s]
vimrc: color tweak for molokai
vimrc: remove cruft
git: ctags integration.

Hooks from tpope to recreate the tags file at judicious moments.

/!\ To be tested... might be too slow on big projects.
(The hooks are copied from ~/.git_template/ to $repo/.git/ on
'git init', you can also directly delete the hooks in $repo/.git/)
git: set sslverify=false, because of ACOS.
bashrc: alias vi=vim, so the Startify plugin works. Symlink doesn't work somehow.
vimrc: updated pathogen call.
vimrc: added plugins Startify, gitgutter and Tagbar.
vimrc: use folds (with foldmethod=marker) by default.