use createFont() over loadFont() in examples and documentation pages

[shiffman]

As per the discussion in #249 in general we should be showing createFont() over loadFont() on documentation pages such as:

https://processing.org/reference/textFont_.html

This also would likely require updating the screenshot images.

[REAS]

I'm making a list of reference entries affected. Most were modified earlier. Now, I can only find these left:

• textFont()
• PFont

[REAS]

These two are updated.

[hamoid]

Not sure if this was the original issue, but https://processing.org/reference/textFont_.html uses loadFont("andalemo.ttf", 32) which fails with loadFont() is for .vlw files, try createFont().