Edited Config Constants
Merge branch 'master' into config_file
Merge branch 'readme_updates'
Added CSS for php-obj-table Classes
Changed Config Constants Definitions

Using a different scheme to refer to CSS_DIR, PHP_DIR, and IMG_DIR.
Added Borders for php-obj-table Class
Simplified Nav Error Handling Scheme; Changed Mutators

Removed a lot of exception throwing and replaced it with simple error
handling.

Changed the methods that mutate the value of the nav_point array to
accept that array as a pass by referrance parameter.
Added Development Status