Bump XML namespaces to 'stable-v1'

This action is performed on *all* active EWP repositories as part of:
erasmus-without-paper/ewp-specs-api-iias#22

README.md

@@ -43,7 +43,7 @@ Therefore:
 
  * To avoid potential problems with performance, proper caching is recommended
    (not only in *this* API, but - primarily - in the Courses API).
- 
+
  * Keep in mind, that this functionality is *not* essential for EWP's mobility
    workflow, and you are free to "skip" this API if you're afraid of
    performance issues. It is also perfectly okay to first make it available,

manifest-entry.xsd

@@ -8,8 +8,6 @@
     targetNamespace="https://github.com/erasmus-without-paper/ewp-specs-api-course-replication/blob/stable-v1/manifest-entry.xsd"
     xmlns="https://github.com/erasmus-without-paper/ewp-specs-api-course-replication/blob/stable-v1/manifest-entry.xsd"
 >
-    <!-- WRTODO: Replace all occurrences of 'master' (in all projects) with 'stable-v1' upon release. -->
-
     <xs:import
         schemaLocation="https://raw.githubusercontent.com/erasmus-without-paper/ewp-specs-architecture/stable-v1/common-types.xsd"
         namespace="https://github.com/erasmus-without-paper/ewp-specs-architecture/blob/stable-v1/common-types.xsd"

response.xsd

@@ -1,18 +1,18 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <xs:schema
     xmlns:xs="http://www.w3.org/2001/XMLSchema"
-    xmlns:course="https://github.com/erasmus-without-paper/ewp-specs-api-courses/tree/master"
+    xmlns:course="https://github.com/erasmus-without-paper/ewp-specs-api-courses/tree/stable-v1"
     xmlns:xml="http://www.w3.org/XML/1998/namespace"
     elementFormDefault="qualified"
 
     targetNamespace="https://github.com/erasmus-without-paper/ewp-specs-api-course-replication/tree/stable-v1"
     xmlns="https://github.com/erasmus-without-paper/ewp-specs-api-course-replication/tree/stable-v1"
 >
-    <!-- WRTODO: Replace all occurrences of 'master' (in all projects) with 'stable-v1' upon release. -->
+    <!-- WRTODO: Do not release until dependants are released: Courses API -->
 
     <xs:import
         schemaLocation="../ewp-specs-api-courses/response.xsd"
-        namespace="https://github.com/erasmus-without-paper/ewp-specs-api-courses/tree/master"
+        namespace="https://github.com/erasmus-without-paper/ewp-specs-api-courses/tree/stable-v1"
     /> <!-- WRTODO: absolute paths! -->
 
     <xs:annotation>