Setup routines

Detailed Description

Files
file	path_assert.m
	Asserts the PATH global is present and initialized.
file	setup_load.m
	Executes file irootlab_setup.m, if exists.
file	setup_write.m
	writes MATLAB M file irootlab_setup.m
file	db_assert.m
	Initializes the DB global.
file	db_reset.m
	Resets the DB global.