Better visibility of Header Navigation Links

Changed the Header Navigation Links color scheme for better visibility, esp. across devices.

**Changes**
* Changed the white links to red
* Changed the text-shadow from white to dark-red on hover to make the link look bold
* Because I use Webstorm IDE, I added the IDE meta files to git ignore list :)

**Reasons**
* Red links in a sea is aesthetically better in my humble opinion
* When viewed in smaller screen the white colored links over-lap with the white waves making the visibility a little more ackward. Red links solve this problem

**Next Steps**
* I intend to make the Header Navigation links a little more responsive design oriented as next step.