Fixed upload servlet
Merge pull request #146 from lukashaertel/master

Fixed upload servlet
Added auth secret to SensorCollector and UploadServlet.

* secret is generated by sensor collector when user id is set and stored in SharedPrefs
* onTransfer secret is stored in HTTP header
* UploadServlet inserts secret in "auth" Table
Fixed obsolete userSecret field.
Notifcation added
Merge pull request #150 from lukashaertel/master

Notifcation added ... plus unmodifiable secret field
New transfer mode based on intent services, may handle multiple files asynchronously
Merge remote-tracking branch 'upstream/master'
Merge pull request #151 from lukashaertel/master

Adresses #124, #130, prepares #142
Added log file from error upload
Merge branch 'master' of github.com:Institute-Web-Science-and-Technologies/LiveGovWP1
Replaced valid file length with sanity check repsecting concatted GZs
Merge pull request #152 from lukashaertel/master

Replaced valid file length with sanity check repsecting concatted GZs
Merge pull request #154 from cEhlen/master

JSON Persistor
Included the JSON file persistor into the appliction
Merge pull request #155 from lukashaertel/master

Included the JSON file persistor into the appliction
Added one log message. Disabled verbose diagnostics.
Merge branch 'master' of github.com:Institute-Web-Science-and-Technologies/LiveGovWP1
Added Databse operations for privacy protection