Release v1.26.0 (#1193)

* Release v1.26.0

* Actually use the nexus-staging-maven-plugin

* Fix leftover snapshot versions in assembly

* Fix snapshot version in assembly

Author: chingor13

README.md

@@ -198,7 +198,7 @@ To use Maven, add the following lines to your pom.xml file:
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client</artifactId>
-        <version>1.25.0</version>
+        <version>1.26.0</version>
       </dependency>
     </dependencies>
   </project>
@@ -211,7 +211,7 @@ repositories {
     mavenCentral()
 }
 dependencies {
-    compile 'com.google.api-client:google-api-client:1.25.0'
+    compile 'com.google.api-client:google-api-client:1.26.0'
 }
 ```
 [//]: # ({x-version-update-end})

google-api-client-android/pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.26.0-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.26.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-android</artifactId>

google-api-client-appengine/pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.26.0-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.26.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-appengine</artifactId>