Add New Theme Monokai Dark Soda and Fix Menu Bug

Add new theme, Monokai Dark Soda, inspired by a Sublime Text 2 theme by [mrlundis](https://github.com/mrlundis/Monokai-Dark-Soda.tmTheme) that I really enjoyed and missed.

Also fixed a `replace` bug where not all hyphens were being replaced if more than one was used for the theme's Theme menu item.

![image](https://f.cloud.github.com/assets/1106234/389241/b1fab986-a6fb-11e2-8235-02baa99b2e17.png)