modify the self-consistent loop:
1. remove the imaginary part of W and Gamma, the real part of G
2. specify the omega region for G, W, and Gamma
3. move the self consistent loop to the main program
Merge remote-tracking branch 'origin/master'

Conflicts:
	V0.4/DiagMC
	V0.4/basic_function.f90
	V0.4/in00
	V0.4/monte_carlo.f90
	V0.4/self_consistent.f90
	V0.4/vrbls_mc.f90
	V0.4/vrbls_mc.mod
merge the conflicts