[feat](Parameters test): Add multi thread convergence surface

Add a multi thread convergence surface test to show how semblance varies
with number of threads and iterations

test/test_parameters/mt_fixed_temp0_c0/Makefile

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+all: generate_data generate_plot view
+
+generate_data: SConstruct
+	scons
+
+generate_plot: plot_test.py
+	python plot_test.py > surface.asc
+
+view: SConscript
+	scons -f $< view

test/test_parameters/mt_fixed_temp0_c0/SConscript

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# SConstruct  (Madagascar Script)
+#
+# Purpose: Parameters test of VFSA process.
+#
+# Site: https://dirack.github.io
+# 
+# Version 1.0
+#
+# Programer: Rodolfo A. C. Neves (Dirack) 10/11/2020
+#
+# Email: rodolfo_profissional@hotmail.com
+#
+# License: GPL-3.0 <https://www.gnu.org/licenses/gpl-3.0.txt>.
+
+# Madagascar library
+from rsf.proj import *
+
+s="surface"
+Flow(s,s+'.asc','dd type=float form=native | smooth rect1=5 rect2=5 repeat=2')
+
+Result(s,'grey color=j scalebar=y title=Semblance')
+
+End()

test/test_parameters/mt_fixed_temp0_c0/SConstruct

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# SConstruct  (Madagascar Script)
+#
+# Purpose: Parameters test of VFSA process.
+#
+# Site: https://dirack.github.io
+# 
+# Version 1.0
+#
+# Programer: Rodolfo A. C. Neves (Dirack) 10/11/2020
+#
+# Email: rodolfo_profissional@hotmail.com
+#
+# License: GPL-3.0 <https://www.gnu.org/licenses/gpl-3.0.txt>.
+
+# Madagascar library
+from rsf.proj import *
+
+# Python math library
+import math
+
+# Modeling: Gaussian reflector in a velocity linear model
+# velocity increases with depth and a 0.5 velocity gradient
+Flow('gaussianReflector',None,
+     '''
+     math d1=0.01 n1=2001 o1=-5 unit1=km label1=Offset
+     output="4-3*exp(-(x1-5)^2/9)"
+     ''')
+
+# Velocity Model
+Flow('velocityModel','gaussianReflector',
+     '''
+     window min1=0 max1=10 |
+     spray axis=1 n=451 d=0.01 o=0 label=Depth unit=km |
+     math output="1.5+0.5*x1+0.0*x2"
+     ''')
+
+Flow('reflectorDip','gaussianReflector','math output="2/3*(x1-5)*input" ')
+
+# Kirchoff Modeling
+Flow('dataCube','gaussianReflector reflectorDip',
+     '''
+     kirmod cmp=y dip=${SOURCES[1]} 
+     nh=161 dh=0.025 h0=0
+     ns=401 ds=0.025 s0=0
+     freq=10 dt=0.004 nt=1001
+     vel=1.5 gradz=0.5 gradx=0.0 verb=y |
+     put d2=0.0125 label3="CMP" unit3="Km" label2="Offset" unit2="Km" label1=Time unit1=s
+     ''')
+
+
+orep=0
+drep=1
+nrep=10
+
+ont=0.
+dnt=1
+nnt=200
+
+om0=5
+dm0=0.1
+nm0=1
+ot0=1.1
+dt0=0.1
+nt0=1
+v0=1.5
+
+for nti in range(nnt):
+    for nrepi in range(nrep):
+
+        repeat = orep+drep*nrepi
+        nt = ont+dnt*nti
+
+        parameters='crsParameters_rep_%d_nt_%d' % (nrepi,nti)
+        # Very Fast Simulated Aneelling Global Optimization (VFSA)
+        Flow(parameters,'dataCube',
+                '''
+                vfsacrsnh om0=%g dm0=%g nm0=%d ot0=%g dt0=%g nt0=%d v0=%g verb=y repeat=%d
+                half=y
+                c0=0.4 temp0=2.5 itmax=%d
+                ''' % (om0,dm0,nm0,ot0,dt0,nt0,v0,repeat,math.floor(nt)))
+
+End()

test/test_parameters/mt_fixed_temp0_c0/plot_test.py

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+import subprocess
+
+orep=0
+drep=1
+nrep=10
+
+ont=0
+dnt=1
+nnt=200
+
+om0=5
+dm0=0.1
+nm0=1
+ot0=1.1
+dt0=0.1
+nt0=1
+v0=1.5
+
+lc0=[]
+lnt=[]
+lrn=[]
+lrnip=[]
+lbeta=[]
+lsemb=[]
+
+for nti in range(nnt):
+
+
+    nt = ont+dnt*nti
+    for nrepi in range(nrep):
+
+        repeat = orep+drep*nrepi
+
+        fileinput = 'crsParameters_rep_%d_nt_%d.rsf' % (nrepi,nti)
+        result = subprocess.check_output(['sfdisfil <'+fileinput+' number=n format="%f "'], shell=True)
+        lista = result.split()
+        lc0.append(float(lista[0]))
+        lnt.append(float(lista[1]))
+        lsemb.append(float(lista[3]))
+        print(float(lista[3]))
+
+print("n1=%d d1=%g o1=%g label1=Threads n2=%d d2=%g o2=%g label2=Iterations data_format=ascii_float in=surface.asc" % (nrep,drep,orep,nnt,dnt,ont))