Fixed --toggle after autohide

Set the internal state to not toggled to properly display the terminal when doing stjerm --toggle. Fixes #5
switching to pgrep to find pid

This seems to be more widely available across distributions. Fixes #7
Fixing using ash and zsh shells

Fixed some code that was not properly passing usable argv value. Fixes #10
start stjerm when using --toggle if not already

If starting stjerm for the first time using the --toggle option, stjerm is left running, and the window is shown right away, as if --toggle was used when stjerm was already running. Fixes #6
cleanup
re-indexing the tabs when re-sorting
fixing syntax error
documenting the new reindex_tabs function
Refactoring a bunch of tab related code

Made a bunch of changes to streamline and cleanup the code in an effort to fix various issues related to #14.
somehow, a line
Building foreign

Fixes errors about missing README (issue #25)
fixing -bl => -l per docs
Change log updates
bumping version number to 0.18