libgdx rtl support (Persian/Arabic)

Support RTL language (Persian/Arabic) language on libgdx BitmapFont

• Support wraped texts.
• Support Persian/Arabic digit, parenthesis, brackets, ...
• Support mixed English and Persian/Arabic text.

Notes

• Some letters may not have been exist. For add new RTL letters, you must add it to RtlGlyph.java.
• You should use a font-file that has English and Persian/Arabic letters.
• Use libgdx 1.9.10 or later.

Screenshots