add a correction term to the integral of Polar to avoid the jump at
tau=0 in W
Merge branch 'test/pr-2' to add the correction term in integral of Polar

Conflicts:
	program/0.50_W_t.dat
	program/G0_t.dat
	program/G_t.dat
	program/Polar_t_test.dat
	program/W0_omega.dat
	program/W_t.dat
	program/W_t_test.dat
	program/vrbls_mc.mod
delete the test files and update the logs