* Implemented Theme Menu.
* Minor adjustments.
* added two new theming attributes, borderColor, borderTextcolor, allows users to modify the boxes that surrounds the menu entries
* added theme info to config file, users can now add theme author, theme name, and theme version to a theme config file.
* tested building on mac osx, added to .gitignore and make clean for files generated on osx
* The path for the theme is now stored in a config string in settings.cfg, instead of a hard-coded theme.cfg path.
* added functions to create/modify settings config for hbmenu theme
* added Default theme entry that will always insert itself at the front of the list of themes
* added code for + and - button, using - button for theme menu now (button display for this is disabled).
* Implement theming and fix spelling errors, fixes issue #6.
Now requires libconfig
"separator" was spelled "seperator"
* Added default case for when the system theme is not the values for light/dark.
The default case acts like the system theme is the dark one.
