Replaced Docbook handbook with ReST

This allows us to build the handbook with plain Sphinx without any extension.
Now docs should build completely on readthedocs.org.  DocBook just sucks
anyway, and never quite fitted into the website

doc/_templates/sidebartop.html

@@ -18,10 +18,10 @@
 
 <ul>
   <li>{{link('Installation instructions', pathto('install'))}}</li>
-  <li>{{link('Handbook', 'handbook/index.html')}}
+  <li>{{link('Handbook', pathto('handbook/index'))}}
     <ul>
-    <li>{{link('Usage', 'handbook/usage.html')}}</li>
-    <li>{{link('Reference', 'handbook/commands.html')}}</li>
+    <li>{{link('Usage', pathto('handbook/usage'))}}</li>
+    <li>{{link('Reference', pathto('handbook/commands'))}}</li>
   </ul>
   </li>
   <li>{{link('Translation guide', pathto('translation_guide'))}}</li>

doc/_themes/synaptiks/static/synaptiks.css_t

@@ -81,3 +81,22 @@ div.body h6 {
     background-color: #ffffff;
     border-bottom: none;
 }
+
+
+/* -- misc styles ----------------------------------------------------------- */
+
+.menuselection,
+.guilabel {
+    background-color: gainsboro;
+    color: black;
+    border: 1px solid #BEBEBE;
+    -khtml-border-radius: 3px;
+    -moz-border-radius: 3px;
+    -webkit-border-radius: 3px;
+    border-radius: 3px;
+    font-style: normal;
+}
+
+.kbd {
+    font-weight: bold;
+}

doc/conf.py

@@ -27,7 +27,6 @@
 
 # add project directory to module path in order to import synaptiks correctly
 doc_directory = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, doc_directory)
 sys.path.insert(0, os.path.normpath(
     os.path.join(doc_directory, os.pardir)))
 
@@ -78,11 +77,10 @@ def __getattr__(self, attribute):
 
 needs_sphinx = '1.0'
 
-extensions = ['sphinx.ext.autodoc', 'sphinx.ext.intersphinx',
-              'sphinx.ext.graphviz', 'sphinxcontrib.issuetracker', 'handbook']
+extensions = ['sphinx.ext.autodoc', 'sphinx.ext.intersphinx', 'sphinx.ext.graphviz', 'sphinxcontrib.issuetracker']
 
 master_doc = 'index'
-exclude_patterns = ['_build/*']
+exclude_patterns = ['_build/*', 'substitutions.rst']
 source_suffix = '.rst'
 
 project = u'synaptiks'