Common libraries update

I'm working on new common libraries version. For now, there're already some changes and new features you might look at. That's what was changed recently:

• libio (v.2)
  
• file.truncate (renamed from file.seteof)
  
• libini (v.3)
  
• ini.enum_sections
• ini.enum_keys
  
• libgfx (v.1)
  
• gfx.open
• gfx.close
• gfx.pen.color
• gfx.brush.color
• gfx.pixel
• gfx.move.to
• gfx.line.to
• gfx.line
• gfx.polyline
• gfx.polyline.to
• gfx.fillrect
• gfx.fillrect.ex
• gfx.framerect
• gfx.framerect.ex
• gfx.rectangle
• gfx.rectangle.ex

If you want to test and probably take part in development, download them (http://mikedld.com/f/, libs-dev-3.*) and contact me for details. Believe me, there's plenty of work waiting for you.