Topics to add to the FAQ/tutorials/documentation

[eXpl0it3r]

Often we end up repeating ourselves when answering the same question over and over again. Adding these Frequenty Asked Questions to the FAQ would be useful, however often you forget what the topic was until it comes up next time. Here's simply a list of things that could be added to the FAQ, feel free to make a pull request if you decided to write something:

• Blurry vs pixel font rendering
• Pixel perfect rendering (texture bleeding, interpolation, etc)
• sf::PrimitiveType::Points/Lines pixel placing + requires offsets
• Undefined reference, understand & solve on your own
• System library linking
• Events & realtime input (again)
• Texture upside down when not calling display() on a render texture
• Stutter related to Nvidia thread optimization & glCheck (topic)
• High CPU usage when no frame rate limiting
• How to squash commits
• Object holding texture being push_back()-ed into a vector issue.
• Proper socket connect behavior when in non-blocking mode
• JACK errors: Jack error message on Ubuntu kcat/openal-soft#53
• min/max Windows macros
• OpenGL Legacy vs "Modern" and limits with SFML's graphics module