update pshell explorer and data import, misc. improvements

FEATURES

- pshell: convert scienta data to true counts
- pre-process: add gauss2_reduction data reduction function
- anglescan: add set_contrast and normalize_strip_phi functions
- explorer: show info about multi-region scans
- documentation: add detailed instructions for angle-scan processing

BUGFIXES

- explorer: fix attributes notebook
- pshell: fix progress bar
- elog: increase the number of accepted attachments

doc/html/pearl-area-import_8ipf_source.html

@@ -32,7 +32,7 @@
  <tr style="height: 56px;">
   <td id="projectalign" style="padding-left: 0.5em;">
    <div id="projectname">PEARL Procedures
-   &#160;<span id="projectnumber">rev-distro-1.4.0-0-g80a01f2</span>
+   &#160;<span id="projectnumber">rev-distro-1.4.0-1-g0a436db-dirty</span>
    </div>
    <div id="projectbrief">Igor procedures for the analysis of PEARL data</div>
   </td>
@@ -145,7 +145,7 @@ $(document).ready(function(){initNavTree('pearl-area-import_8ipf_source.html',''
 <div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
   <ul>
     <li class="navelem"><a class="el" href="dir_fe5dc42579d4b99403482a3a637d9f7d.html">pearl</a></li><li class="navelem"><a class="el" href="pearl-area-import_8ipf.html">pearl-area-import.ipf</a></li>
-    <li class="footer">Generated on Tue Jul 4 2017 11:17:31 for PEARL Procedures by
+    <li class="footer">Generated on Thu Sep 21 2017 12:35:03 for PEARL Procedures by
     <a href="http://www.doxygen.org/index.html">
     <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.11 </li>
   </ul>