Corrected the header include directory in doxygen conf
diff --git a/api.doxygen b/api.doxygen
index d37814a..b812add 100644
--- a/api.doxygen
+++ b/api.doxygen
@@ -1,6 +1,6 @@
PROJECT_NAME = libgit2
-INPUT = src/git2
+INPUT = include/git2
QUIET = YES
RECURSIVE = YES
FILE_PATTERNS = *.h