Add current fractal information help menu

[kanurag94]

Fixes #164

Added: Help -> Info on current fractal opens up the wiki for the current fractal at https://github.com/xaos-project/XaoS/wiki/Fractal-Types

[kovzol]

Thanks, the change is nice. I have some minor suggestions:

• The higher-power Mandelbrots should link to https://github.com/xaos-project/XaoS/wiki/Fractal-Types#higher-power-mandelbrots.
• The octal fractal should go to #octo.
  For the other missing fractals I will extend the Github wiki soon.

[kanurag94]

I have addressed these in f01fad8
I would manually change the url for others once you update the wiki. :D

[kovzol]

Thanks!

[kovzol]

I updated the wiki. Some fractals would need more information, but as a first step I think now it's OK.
I am not completely satisfied with the fractal names in XaoS. E.g. "S.Carpet" looks ugly, instead of that "Sierpinski Carpet" should be used. Please, could you check why S.Carpet is given there? Also, I am unsure why "Sym. Barnsley" is used instead of "Symmetric Barnsley". Maybe it would be better to use "Sierpinski Triangle" instead of "Sierpinski" and "Spidron Hornflake" instead of "Spidron hornflake" (unifying capitalization).
What do you think?

[kovzol]

And maybe we can unify Octo/Octal. I am unsure which one should be used.

[kanurag94]

All these are short names and abbreviations used for the names. They can be very well renamed with proper names and capitalization.
I think we should use Octo instead of Octal. Octal does not make much sense unless we say Octal Mandelbrot.