* Reinitialize OpenGL context fullscreen toggle
* Extended a few comments

* Windoze "resets" the OpenGL context when SetVideoMode is called - ergo, we need to reinitialize the context
* Added a switch (recycle) to initialize() to distinguish between one-off and recurring actions

* The interface declared in AbstractGraphicsEngine is now implemented in the most specialized class only (to make sure it's called, down the inheritance hierarchy)
* The abstract or generelized classes (up the hierarchy) got local implementation (protected) which are called by their respective children.
* Fixed a bug in the old starsphere code. Search marker rendering deleted to much (memory corruption)! Does OpenGL do any boundary checking?

* Using single font instances per text group (adds flexibility, avoid font change during render)
* initialize() and resize() are now virtual, and overridden in subclass
* HUD dimensions now follow actual size (no more scaling needed)
* No more FSAA needed
* Removed unnecessary Open GL calls during render

Pro:
- Crystal clear HUD text
- Constant HUD text size
Con:
- Slightly higher CPU usage (5% -> 7.5%, also for full screen?)

* To include new classes
* To use a "normally" installed OGLFT

* Proper use of enum types
* Current values of ascension/declination properly initialized (have to get a value outside the valid range)

* Support for flexible requests of engine and specific science app support
* Could easily be passed as command line parameter for instance

* Now there's a generic Einstein@Home and a science run specific part
* Search information retieval and rendering moved into subclass
* Renamed a few things as they're now true members
* Moved a few things from private to protected (obviously)

* Now there's a generic and science application specific (e.g. shared memory handling) part
* The actual shared memory indentifier now has to be passed during initialize() instead of being hard-coded
* All this might eventually allow us to incorporate some portions of this API into something more general like a generic graphics toolkit

* Grayscale faces do need a backgorund color
* Texture faces do need enabled textures (oh well)
* Translucent faces need activated alpha blending (you guessed it)

Added preliminary test code for OGLFT which might eventually replace FTGL (so far FTGL seems to be the culprit that causes the nasty "HUD killing" bug)

* Arrays must not be declared extern (would then be defined twice)
* Arrays must not be declared const (would have internal linkage)

Still doesn't work reliably...

* For sphere rotation
* For observatory positioning

Note: the original code seems to have a bug which explains a slight discrepancy between this new and the original visualisation.
In the original code gmt_dtime() is used to get the GMT time, but this function is a mere #define of dtime() under unix, hence any
difference of dtime() and gmt_dtime() will result in 0 instead of the real UTC/GMT offset.

Note: dtime() returns local time...

Added "new" feature to display the search marker (gunsight). Can be toggled with the "m" key (default: enabled).

Substituted sprintf with stream manipulators (as promised) and added stream termination manipulators where appropriate