Add 'dep-yaourt' shell function.

This function uses yaourt to sync a package and pacman to set it as a
dependency.
Add 'pa', 'paa', and 'pam' (persistent argument) shell functions.

These functions run commands with persistent arguments.
Update shell aliases.

This...
- adds a 'confirm' function.
- makes 'is-available' use 'command' instead of 'hash'
- adds some new ls functions and aliases
- changes 'xl' (clear, ls) to 'cl'
- changes 'sz' to 'so'
- changes 'p' to 'o'
- splits some lines
- changes 'di' (diff) to 'dv'
- changes 'pd[dd]' to 'po[oo]'
- changes 'g' (git) to 'h'
- changes 'record' to 'audio-record'
- adds a 'secure' function to secure the permissions of a file or
  directory
- adds 'giveme' alias to give the current user full ownership of a file
- changes 'X' 'C'
- adds a 'baseconv' function