Update version codes for v0.8.0

Author: zglueck

README.md

@@ -18,7 +18,7 @@ geometric objects.
 
 Download the [latest release](https://bintray.com/nasaworldwind/maven/WorldWindAndroid/_latestVersion) or grab via Gradle:
 ```groovy
-compile 'gov.nasa.worldwind.android:worldwind:0.7.0'
+compile 'gov.nasa.worldwind.android:worldwind:0.8.0'
 ```
 
 ## Snapshots
@@ -33,7 +33,7 @@ repositories {
 
 ...
 
-compile 'gov.nasa.worldwind.android:worldwind:0.8.0-SNAPSHOT'
+compile 'gov.nasa.worldwind.android:worldwind:0.9.0-SNAPSHOT'
 ```
 
 ## Releases and Roadmap

worldwind-examples/build.gradle

@@ -7,7 +7,7 @@ android {
         minSdkVersion 23
         targetSdkVersion 23
         versionCode 10
-        versionName '0.8.0-SNAPSHOT'
+        versionName '0.8.0'
     }
     buildTypes {
         release {

worldwind-tutorials/build.gradle

@@ -7,7 +7,7 @@ android {
         minSdkVersion 23
         targetSdkVersion 23
         versionCode 10
-        versionName '0.8.0-SNAPSHOT'
+        versionName '0.8.0'
     }
     buildTypes {
         release {

worldwind/build.gradle

@@ -19,7 +19,7 @@ android {
         minSdkVersion 16
         targetSdkVersion 23
         versionCode 10
-        versionName '0.8.0-SNAPSHOT'
+        versionName '0.8.0'
         testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
     }
     buildTypes {