Replace 2.2 with 2.3 in file headings

src/hash.c

@@ -1,7 +1,7 @@
  /*
   ******************************************************************************
   Project:      OWA EPANET
-  Version:      2.2
+  Version:      2.3
   Module:       hash.c
   Description:  implementation of a simple hash table
   Authors:      see AUTHORS

src/hash.h

@@ -1,7 +1,7 @@
 /*
  ******************************************************************************
  Project:      OWA EPANET
- Version:      2.2
+ Version:      2.3
  Module:       hash.h
  Description:  header for a simple hash table
  Authors:      see AUTHORS

src/hydcoeffs.c

@@ -1,7 +1,7 @@
 /*
  ******************************************************************************
  Project:      OWA EPANET
- Version:      2.2
+ Version:      2.3
  Module:       hydcoeffs.c
  Description:  computes coefficients for a hydraulic solution matrix
  Authors:      see AUTHORS

src/hydsolver.c

@@ -1,7 +1,7 @@
 /*
  ******************************************************************************
  Project:      OWA EPANET
- Version:      2.2
+ Version:      2.3
  Module:       hydsolver.c
  Description:  computes flows and pressures throughout a pipe network using
                Todini's Global Gradient Algorithm

src/hydstatus.c

@@ -1,7 +1,7 @@
 /*
 ******************************************************************************
 Project:      OWA EPANET
-Version:      2.2
+Version:      2.3
 Module:       hydstatus.c
 Description:  updates hydraulic status of network elements
 Authors:      see AUTHORS

src/mempool.c

@@ -1,7 +1,7 @@
 /*
  ******************************************************************************
  Project:      OWA EPANET
- Version:      2.2
+ Version:      2.3
  Module:       mempool.c
  Description:  a simple fast poooled memory allocation package
  Authors:      see AUTHORS

src/mempool.h

@@ -1,7 +1,7 @@
 /*
  ******************************************************************************
  Project:      OWA EPANET
- Version:      2.2
+ Version:      2.3
  Module:       mempool.h
  Description:  header for a simple pooled memory allocator
  Authors:      see AUTHORS

src/output.c

@@ -1,7 +1,7 @@
 /*
 ******************************************************************************
 Project:      OWA EPANET
-Version:      2.2
+Version:      2.3
 Module:       output.c
 Description:  binary file read/write routines
 Authors:      see AUTHORS

src/qualreact.c

@@ -1,7 +1,7 @@
 /*
 ******************************************************************************
 Project:      OWA EPANET
-Version:      2.2
+Version:      2.3
 Module:       qualreact.c
 Description:  computes water quality reactions within pipes and tanks
 Authors:      see AUTHORS

src/smatrix.c

@@ -1,7 +1,7 @@
 /*
  ******************************************************************************
  Project:      OWA EPANET
- Version:      2.2
+ Version:      2.3
  Module:       smatrix.c
  Description:  solves a sparse set of linear equations
  Authors:      see AUTHORS