Build: 1	Version: 2.5	Branch: Master

	* sf.lang._package.java: New file.
	* simple.css: Change styles of doxygen documentation. The original
	file is in docs/styles.css.
	* sf/lang/RUNTIME.java: New interface with constants.
	* sf/utils/SFDateTime.java: New class. Incomplete.
	* sf/log/debug.java: New class. Incomplete.