Adding gentime_wd.py, tb.py & terminalcolors.py

- gentime_wd.py creates a list of hours with random variation but without
  accumulated shift. Useful to mark in/out hours.
- tb.py is a script that ascends to root directory searching for the
  root of a project. It was made so that a project bulder / compiler /
  script that most be called from the root of projet can be executed
  from anywhere in the project tree using this wrapper. It was made to
  work like git works knowing that it is in a repository even when called
  from a subfolder.
- terminalcolors.py is yet another program to print the terminal colors.
  But this one shows the 256 colors terminal pallet.
Add new alias "lsd" to bashrc.

"lsd" is a alias to "dirs -v" which lists directory stack one per line
with the index number for each one.