Ditch total number of lines count. Fix issue #64.

Tested against 24.4.
whitespace
Show current-directory in Shell and eshell.
small optimizations
Take over dired's buffer-identification.

We will undo this if dired ever does anything special with this variable.
Change the order of line/column numbers.

Use sml/order-of-line-and-column.
Implements issue #60.
Projectile integration!

To disable it, set sml/use-projectile-p.
Implements issue #58.