Add Fortran (#144)

* C to Fortran translation

* Swap the enums for raw parameters

* Add a simple example.

Fortran/README.md

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+## Getting Started
+
+Here's an example for creating a 128x128 array of OpenSimplex2S noise
+
+```Fortran
+program test_fast_noise
+  use :: fast_noise_lite
+  use, intrinsic :: iso_c_binding
+  implicit none
+
+  type(fnl_state) :: noise_state
+  real(c_float), dimension(128,128) :: noise_data
+  integer(c_int) :: x, y
+
+  ! Create the state.
+  noise_state = fnl_state()
+  noise_state%noise_type = FNL_NOISE_OPENSIMPLEX2S
+
+  ! Collect the noise data.
+  do y = 1,128
+    do x = 1,128
+      noise_data(x,y) = fnl_get_noise_2d(noise_state, real(x, c_float), real(y, c_float))
+    end do
+  end do
+
+  ! Do something with this data...
+end program test_fast_noise
+```