Small format and spell fixes.
Small fixes to some scripts and config.

smear.sh: Add default color when using --color.
tb.py: fix argument handling.
Xresources: URXVT, add default plugins to urxvt and set smaller
scroll buffer
Bugfix: bashrc scape sequences + set title

The bashrc feature to set the window title was not working in all the
cases. So there is some fixes that may make work all the time.
Add new alias in gitconfig, the 'lg'.

'lg' show the authors of commits and short lines.
Full support to ANSI colors in smear.sh

now you can call smear.sh with '-C n', with n being the index for the
terminal ansi 8 colors. so, from 0 to 7 are valid.
Add two new programs: betterterm.sh and chrome-tmp.sh

- betterterm.sh is a fun program to dinamically change the color of
default color of the terminal. just run it in background for a LSC trip.
- chrome-tmp.sh is a simple wrapper to call google-chrome in a clean
  profile and configuration and with proxy to localhost.
WIP: LAST MODIFICATIONS ON PADTEC