Merge pull request #38 from garrettdalton/master

add new global warming visuals, add warmth object/function
iceberg effect, generation and generator
iceberg code version 2
cleaned up files, added menus, moved poles
added new menu files
modified screen main menu png
merged files
Merge pull request #39 from georgexzeng/master

Cleaned up files, added menus, moved poles
typo cleanups
Merge pull request #40 from georgexzeng/master

typo cleanups
added lakes feature
Merge pull request #42 from woolly-bear-caterpillars-2014/lakes2

added lakes feature; inspected by Derek