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/modules/moduleTable.f90

@@ -52,6 +52,7 @@ MODULE moduleTable
       i = 0
       DO 
         READ(id, '(A)', iostat = stat) dummy
+        !TODO: Make this a function
         IF (INDEX(dummy,'#') /= 0) CYCLE
         IF (stat /= 0) EXIT
         !Add data