v0.2.9: fixing up bridge, concrete, and road rendering

fixing up rendering and tile logic for bridges, concrete, and roads,
handling all use-cases seen with current random data (probably more
tuning and bugfixing later). also switching to new assets, which have
better shadows

v0.2.8: adding initial game music integration and controls

adding initial integration with howler to play game music, with simple
music controls enabled after turning on option

v0.2.7

updating release notes date

v0.2.6: fixing release notes, adding twitter link

fixing up release notes and adding link to new twitter account

v0.2.5: adding dedicated release notes page, layout adjustments

small adjustments and refactorings to support multiple layouts,
including starting to consider mobile layout for client. also adding
dedicated release notes page that can scale better

v0.2.4: fixing overlay bug, removing prefetch

fixing overlay index bug and removing js prefetch to reduce files loaded

v0.2.3: adding localStorage option state, event fix

fixing bug with event manager and adding logic to load options from
localStorage

v0.2.2: fixing up building z-order rendering

fixing up rendering of buildings by properly handling z-order

v0.2.1

fixing version identifier

v0.2.0: releasing v0.2 and updating notes

updating release notes and bumping version to v0.2, with all tasks
completed (moving z-ordering to next version)