Added support for a default size setting

Fixes #61

Author: britzl

README.md

@@ -157,6 +157,7 @@ The `settings` table can contain the following values:
 
 * `width` (number) - Maximum width of a line of text. Omit this value to present the entire text on a single line
 * `position` (vector3) - The position that the text aligns to (refer to the `align` setting for details). Defaults to 0,0 if not specified.
+* `size` (number) - Default size of any created node. Same as using a `<size=2>` tag in the text. Defaults to 1 if not specified.
 * `parent` (node) - GUI nodes will be attached to this node if specified.
 * `fonts` (table) - Table with fonts, keyed on font name. See separate section below. If no `fonts` table is provided the font used will be the one passed to `richtext.create()`.
 * `layers` (table) - Table with font, texture and spine scene mappings to layer names. See separate section below.

richtext/richtext.lua

@@ -331,6 +331,7 @@ function M.create(text, font, settings)
 	settings = settings or {}
 	settings.align = settings.align or M.ALIGN_LEFT
 	settings.valign = settings.valign or M.VALIGN_TOP
+	settings.size = settings.size or 1
 	settings.fonts = settings.fonts or {}
 	settings.fonts[font] = settings.fonts[font] or { regular = hash(font) }
 	settings.layers = settings.layers or {}
@@ -369,7 +370,7 @@ function M.create(text, font, settings)
 		shadow = settings.shadow,
 		outline = settings.outline,
 		font = font,
-		size = 1
+		size = settings.size
 	}
 	local words = parser.parse(text, word_settings)
 	local text_metrics = {