Bump TurboJPEG C API revision to 1.5

The changes relative to 1.4.x are only cosmetic (using const pointers)
and should not affect API/ABI compatibility, but our practice is to
synchronize the API revision with the most recent release that provides
user-visible changes to the API.
diff --git a/doc/html/annotated.html b/doc/html/annotated.html
index dad0fb1..d0b0e1e 100644
--- a/doc/html/annotated.html
+++ b/doc/html/annotated.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/classes.html b/doc/html/classes.html
index 7720c67..275e96d 100644
--- a/doc/html/classes.html
+++ b/doc/html/classes.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/functions.html b/doc/html/functions.html
index b13faed..31d78f5 100644
--- a/doc/html/functions.html
+++ b/doc/html/functions.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/functions_vars.html b/doc/html/functions_vars.html
index cca5603..8373eac 100644
--- a/doc/html/functions_vars.html
+++ b/doc/html/functions_vars.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/group___turbo_j_p_e_g.html b/doc/html/group___turbo_j_p_e_g.html
index 553ec92..4b8d306 100644
--- a/doc/html/group___turbo_j_p_e_g.html
+++ b/doc/html/group___turbo_j_p_e_g.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/index.html b/doc/html/index.html
index ccaa12e..3cc1b3e 100644
--- a/doc/html/index.html
+++ b/doc/html/index.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/modules.html b/doc/html/modules.html
index 9b41adb..8e6f815 100644
--- a/doc/html/modules.html
+++ b/doc/html/modules.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/structtjregion.html b/doc/html/structtjregion.html
index d22c09e..af2a473 100644
--- a/doc/html/structtjregion.html
+++ b/doc/html/structtjregion.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/structtjscalingfactor.html b/doc/html/structtjscalingfactor.html
index f7b7c84..3bb50f5 100644
--- a/doc/html/structtjscalingfactor.html
+++ b/doc/html/structtjscalingfactor.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doc/html/structtjtransform.html b/doc/html/structtjtransform.html
index 3bfd129..9fd97f7 100644
--- a/doc/html/structtjtransform.html
+++ b/doc/html/structtjtransform.html
@@ -24,7 +24,7 @@
  <tr style="height: 56px;">
   <td style="padding-left: 0.5em;">
    <div id="projectname">TurboJPEG
-   &#160;<span id="projectnumber">1.4</span>
+   &#160;<span id="projectnumber">1.5</span>
    </div>
   </td>
  </tr>
diff --git a/doxygen.config b/doxygen.config
index 4ffba68..1723123 100644
--- a/doxygen.config
+++ b/doxygen.config
@@ -1,5 +1,5 @@
 PROJECT_NAME = TurboJPEG
-PROJECT_NUMBER = 1.4
+PROJECT_NUMBER = 1.5
 OUTPUT_DIRECTORY = doc/
 USE_WINDOWS_ENCODING = NO
 OPTIMIZE_OUTPUT_FOR_C = YES