Adds scale attribute to text paragraphs

[joazlazer]

• Adds the scale attribute to the <p> tag which accepts a decimal (specifically a float)
  • Example: <p scale="2">This text is twice as large</p>
  • At its core, it uses GlStateManager.scale(scale, scale, 1f); to scale the text rendering
• Modifies the properties of the <title> tag to add have scale="1.5" and remove italics="true"
• Adds a float scale parameter to each of the text-rendering methods that allow scaled text
• Updates the in-game documentation to feature this new attribute

[joazlazer]

The scale tag has a limitation when align="center" or "right" where if the text spans more than one line, it will not receive the proper alignment and will instead simply be "left" aligned. However, this appears to be a more general limitation with the text rendering and alignment structure and not with the new feature.

[gigaherz]

I'm going to start merging these PRs, just be warned that my IntelliJ is configured to reformat using "proper" brackets, so sooner or later there will be a cleanup commit including a project-wide reformat like I do every now and then. (Yeah I'm not a fan of Egyptian brackets. ;P )

The only concern I have about this is that I tried very hard to keep the font sizes as multiples of screen pixels, like the GUI scaling does, to avoid having distorted fonts, and these free-scaled titles are going to look somewhat "warped" due to texcoord rounding, unless you use very high res fonts. But eh, can't do miracles.