Publish mongoose src and tests

CL: Mongoose Web Server: Publish sources and tests

Resolves https://github.com/cesanta/mongoose/issues/745

PUBLISHED_FROM=7ecd7a3c518cfa614a6ba0838678dcb91b75a8c0

test/data/multipart.txt

@@ -0,0 +1,13 @@
+------WebKitFormBoundaryh3pBS3C5nni6XxR4
+Content-Disposition: form-data; name="file1"; filename="keyword.c"
+Content-Type: application/octet-stream
+
+file1 data
+
+------WebKitFormBoundaryh3pBS3C5nni6XxR4
+Content-Disposition: form-data; name="file2"; filename="stdarg.c"
+Content-Type: application/octet-stream
+
+file2 data
+
+------WebKitFormBoundaryh3pBS3C5nni6XxR4--