Windows build requires shoes.bat from ext/install
Merge pull request #771 from glenn-murray-bse/master

Windows build requires shoes.bat from ext/install

Slight revision from the branch to only take the ext/install change.

Changelog: bugfix
Revise order on rake install:all

Noticed that on a clean machine without any of the new gems, the rake
install:all task would fail because of ordering (we need to install
shoes-dsl, shoes-swt, then shoes in the current scheme).