CB-6900 fixed spec.7 for wp8

Test needs to check for x-wmapp0:/ instead of file:/ in case of wp
CB-7223 spec.27 marked pending for wp8

since wp8 does not support custom headers
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-plugin-file-transfer into fixtests
Fix for https://issues.apache.org/jira/browse/CB-4674

https://issues.apache.org/jira/browse/CB-4674
Fixes #CB-8021 - adds documentation for httpMethod to doc/index.md. However, translations still need to be addressed.
Merge branch 'fixtests'
Merge branch 'CB-8021'
Merge branch 'CB-4674'
CB-8110 Updated version and RELEASENOTES.md for release 0.4.8
CB-8110 Incremented plugin version.