Most of modules organized

Most of the modules are organized in subfolders.

Maybe some big re-organization is needed in the future, but for now I am
happy.

src/modules/moduleConstParam.f90

@@ -1,17 +0,0 @@
-!Physical and mathematical constants
-MODULE moduleConstParam
-  IMPLICIT NONE
-
-  PUBLIC
-
-  REAL(8), PARAMETER:: PI  = 4.D0*DATAN(1.D0) !number pi
-  REAL(8), PARAMETER:: PI2 = 2.D0*PI !2*pi
-  REAL(8), PARAMETER:: PI8 = 8.D0*PI !2*pi
-  REAL(8), PARAMETER:: sccm2atomPerS = 4.5D17 !sccm to atom s^-1
-  REAL(8), PARAMETER:: qe = 1.60217662D-19 !Elementary charge
-  REAL(8), PARAMETER:: kb = 1.38064852D-23 !Boltzmann constants SI
-  REAL(8), PARAMETER:: eV2J = qe !Electron volt to Joule conversion
-  REAL(8), PARAMETER:: eps_0 = 8.8542D-12 !Epsilon_0
-
-END MODULE moduleConstParam
-