Added window_resize_gui_scenario_editor (0x0066F0DD).
Decompiled window_zoom_in and window_zoom_out.
implement new campaign window
Merge pull request #276 from hexdec/master

Window_resize_gui for scenario editor and window_zoom_in/out
Fixes water display issues.
Fix primary secondary tertiary colour sprites
Swapped variable names to match game
Added notes to draw_sprite
Cleaned up obsolete variables
Removed redundant comments about not being tested