Refactor, separate docs from headers, add ru docs

Doxygen kind'a sucks and I need multilanguage documentation, so I did
that. Also, separated massive Math.h file into smaller files.

util/whitespace.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
-find . \( -iname "*.h" -o -iname "*.c" -o -iname "*.md" \) -exec sed -i .bak "s/[ ]*$//" {} \;
+find . \( -iname "*.h" -o -iname "*.c" -o -iname "*.md" -o -iname "*.pod" \) -exec sed -i.bak "s/[ ]*$//" {} \;
 find . -iname "*.bak" -exec rm {} \;