Moved all event listener registrations from game.client.ui.js to game.client.ui.browser.js.
Merge branch 'refactor' of https://github.com/beckbaibai/enemy_unknown into refactor
Move remaining event listeners to game.client.ui.browser.js; add hexgrid initialization in game.client.js. TODO: in game.client.ui.browser.js, where is whichUnitToBuild and clientMarkBuildable??
Merge branch 'refactor' of https://github.com/beckbaibai/enemy_unknown into refactor