[libcloudproviders] general: Add link to API documentation to the README

[Gitlab System User <gitlab src gnome org>]

commit 913d4b5b661443295b3c0e8f0a84a9c458fc6e89
Author: Julius Härtl <github jus li>
Date:   Fri Sep 1 18:56:36 2017 +0000

    general: Add link to API documentation to the README

 README.md | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/README.md b/README.md
index b160b10..632ead0 100644
--- a/README.md
+++ b/README.md
@@ -38,3 +38,8 @@ of accounts and can then interact with these though the
 
 An example implementation using libcloudprovider can be found in
 [test/testcloudproviderclient.c](test/testcloudproviderclient.c).
+
+## API Documentation
+
+See the [API documentation](https://csoriano.gitlab.io/libcloudprovidersweb/) for further details.
+