Update INSTALL.md
- git no longer requires gettext by default (needed for "git submodule init")
- Windows doesn't have sudo
- pip mysteriously will not install png.py
Merge pull request #48 from yenatch/master

Clean up post-split main.asm. Get rid of static wram addresses. Lay out a foundation for Yellow.
Merge branch 'master' of https://github.com/iimarckus/pokered