new files that were on develop-server but not in rep (not modified by me)

merging with recent changes in alladin-github (mainly deletion of ping, speed_down, speed_up and modification of resultResource)

merging with recent changes in alladin-github #2 (resources)
-) Allow viewing open_test_uuid and open_uuid in TestResult
-) Export images for sharing the results
-) beginning work on open-data-service in addition to csv file
get all recent tests (@todo: pointer for navigating in linked list)
get all tests by one open_uuid
get metadata for test by open_test_uuid
open-test-uuid now starts with upper-case-"O" (like open-uuids start with "P")
CSV-Export is now cached (but @TODO: Test for possible concurrency issues)
optimierung routing
overworked opentestresource (json-format, fields in header, paging)
fixed #35 (upload and download in images swapped)
speed-graph in opentestresource now functional
renamed "facebook" in imageexport to "thumbnail" to avoid misunderstandings
added classification to openTestResource
reduction of complexity: resource for ONE specific test and resource for more tests are now separated
search-criteria for open-tests now possible
now possible to search for provider-name
provider-name now displayed in open-data-test-resource
!!!!change in interface /history
requested from appscape: classification of measurements in /history-resource (upload, download, ping; no signal_strength since unsupported in iOS)
!!!!
OpenTestSearchResource now provides options for ordering the results by
given criteria
cleanup in OpenTestResource
new images for forumbanners (without the rtr-logo and with correct
labeling of speeds)
bugfix
cleanup and comments
pushing local commit
geo_accuracy added for single test result
share link with link to opendata
2 significant digits in images
loc_accuracy now numeric