Merge pull request #1 from CppCon/master

Bring fork up-to-date with upstream

Author: phalpern

Demos/Naked Coroutines Live/Naked Coroutines Live - Gor Nishanov - CppCon 2017.pdf

@@ -0,0 +1,3 @@
+**CNL A Compositional Numeric Library** by **John McFarlane**
+
+Additional information: https://github.com/johnmcfarlane/cnl/

Keynotes/C++ as a 'Live at Head' Language/C++ as a 'Live at Head' Language - Titus Winters - CppCon 2017.pdf

@@ -61,7 +61,7 @@ def get_author_from_readme_md(path):
 
             if match:
                 return match.group(2)
-        
+
         return ""
 
     def md_path(path):
@@ -129,7 +129,11 @@ def generate_index(readme, path):
     dir_contents.sort(key=lambda s: s.lower())
 
     for name in dir_contents:
-        generate_entry(readme, name, join(path, name))
+        try:
+            # empty directories or other such issues get skipped over
+            generate_entry(readme, name, join(path, name))
+        except:
+            pass
 
 
 def add_presentation(path):
@@ -166,7 +170,7 @@ def add_presentation(path):
                 title = match.group(1)
                 author = match.group(2)
     else:
-        title_author_regex = re.compile("(.*) - (.*) - CppCon " + 
+        title_author_regex = re.compile("(.*) - (.*) - CppCon " +
                                         str(CPPCON_YEAR) + r"\.[^.]*$")
 
         title_author_match = title_author_regex.search(filename)