Begin work on the Keras adapter module

Author: milancurcic

src/nf/nf_keras.f90

@@ -0,0 +1,30 @@
+module nf_keras
+
+  !! This module provides procedures to read and parse Keras models
+  !! from HDF5 files.
+
+  implicit none
+
+  private
+  public :: get_keras_h5_layers
+
+  type :: keras_layer
+    !! Intermediate container to convey the Keras layer information
+    !! to neural-fortran layer constructors.
+    character(:), allocatable :: type
+    character(:), allocatable :: name
+    character(:), allocatable :: activation
+    integer, allocatable :: num_elements(:)
+  end type keras_layer
+
+  interface
+
+    module function get_keras_h5_layers(filename) result(res)
+      character(*), intent(in) :: filename
+        !! HDF5 file name
+      type(keras_layer), allocatable :: res(:)
+    end function get_keras_h5_layers
+
+  end interface
+
+end module nf_keras