Final implementation of ionization process by electron impact.

Possibility to input initial species distributions (density, velocity
    and temperature) via an input file for each species.

New moduleRandom includes function to generate random numbers in
different ways (still uses) the implicit RANDOM_NUMBER().

src/fpakc.f90

@@ -2,13 +2,11 @@
 PROGRAM fpakc
   USE moduleInput
   USE moduleErrors
-  USE OMP_LIB
   USE moduleInject
   USE moduleSolver
-  USE moduleOutput
   USE moduleCompTime
-  USE moduleCollisions
-  USE moduleMesh
+  USE moduleCaseParam
+  USE OMP_LIB
   IMPLICIT NONE
 
   ! t = time step
@@ -28,8 +26,17 @@ PROGRAM fpakc
   !Reads the json configuration file
   CALL readConfig(inputFile)
 
+  !$OMP PARALLEL DEFAULT(SHARED)
+  !$OMP SINGLE
+  CALL verboseError("Initial scatter of particles...")
+  !$OMP END SINGLE
+  CALL doScatter()
+
+  !$OMP SINGLE
   CALL verboseError("Calculating initial EM field...")
+  !$OMP END SINGLE
   CALL doEMField()
+  !$OMP END PARALLEL
 
   tStep = omp_get_wtime() - tStep