GUI. Non functional. Working tabs (as in #28) Only Iberian images. has a weird mouse offset bug.
implemented terrain loading
Simple mouseover
added missing files
Menu now dispatches event when a structure icon is clicked (#30).
Index.html shows example of event listener
Roman icons in place (excluding civic center because I could not find the texture to the model
Persian icons!
Carthaginian icons
Top bar with resources. (#24)
Hellenes icons. A lot are missing because the .dae files are not in order
Repositioned some icons and changed mouseover behaviour
Selected state of structure icons
updated generated terrain
cleaned up some log messages
Merge branch 'terrain' into gui
fixed mouse projection offsets