Fix a warning.

ChunkDevice::isSequential should be const.
Merge pull request #93 from nierob/fixChunkDevice

Fix a warning.
Rename apiUrl to serviceUrl.
Mark EnginioClient::serviceUrl property as internal
Merge pull request #94 from gladhorn/buildsystem

Build without qt quick
Merge pull request #95 from nierob/fixApiUrlAfterAPIReview

Fix api url after api review
QML tests on Mac should be build as Unix binaries instead of app bundles.

Also add some debug output about the QML2_IMPORT_PATH used.
Implement file/view
Downloads should take fileId and not objects