Extrawide support - 16:9/16:10/2:1/18:9/18.5:9 + Bug fixes

Version 1.10

1. Added Extrawide support, with 384x224 internal resolution. Can be used on 16:9 mode (without pixel stretching) and 2:1/18:9/18.5:9 (with pixel streching, similar to CRT TVs); 352x224 is available too for 16:9 (with pixel stretching) and 16:10 (without pixel stretching)
2. Fixed the koopa shell appearing on screen when vertically offscreen when shaking/staring or running, fixes #10
3. Fixed some enemies spawning to the right direction, partially fixes #26 and #13

SMW Widescreen - 16:10 (without pixel stretching):

SMW Widescreen - 16:9 (with pixel stretching):

SMW Extrawide - 16:9 (without pixel stretching):

SMW Extrawide - 2:1/18:9/18.5:9 (with pixel stretching):