Removes reference to register_uninstall_hook from code comment

Perhaps mention uninstall.php in stead?

```
// Register hooks that are fired when the plugin is activated or deactivated.
// When the plugin is deleted, the uninstall.php file is loaded.
```
Mention uninstall.php in code comment
Merge pull request #77 from barryceelen/patch-1

Removes reference to register_uninstall_hook from code comment
Place options page under 'Settings' in stead of 'Plugins' menu
Merge pull request #81 from barryceelen/patch-1

Place options page under 'Settings' in stead of 'Plugins' menu
Update $plugin_slug comment

The boilerplate uses the variable name when internationalizing strings, where the comment on $plugin_slug says to do the opposite.
Merge pull request #82 from barryceelen/patch-1

Update $plugin_slug comment
Add admin class
Update inline documentation
Move function lower down
Merge pull request #86 from grappler/master

Add admin class
Moving the screenshot to the assets directory

Related #89
updating the javascript to include more whitespace as per the wordpress javascript coding standards
adding a 'GitHub Plugin URI' to the wordpress-plugin header

Fixes #75
defining a section to provide links for recommended tools
Update README.txt

Add additional possible installation methods
Merge pull request #92 from grappler/patch-1

Update README.txt
adding a 'TODO' so users can more easily find where all they need to supply the name of their plugin

Fixes #91
Removing a lot of whitespace, updating function comments, and comment blocks within a function, and making sure no comments exceed 80 characters
removing extraneous whitespace, making sure comment lines don't exceed 80 characters, and providing updated comment blocks for functions, inline comments, and documentation for the new admin class