Main/VirtualBox: eliminate redundant parameter to i_registerMedium, avoiding bugs with registering e.g. floppy images as hard disks. Main/Medium: switch over to CreateMedium, final API touch-ups, variable name cleanup, typo checking for backend support of fixed image creation, check for backends not supporting a particular device type Frontends/VBoxManage: cleanup, adapt to new API, generalize all operations which worked on hard disks only to all device types Frontends/VirtualBox: adapt to new API

Main: Whitespace (including tabs!) and svn:keywords cleanups by scm.

Main/Medium: redesign API level medium locking, needed conversions from MediaList to MediumLockLists in several places, forced cleanups elsewhere, too Main/Token: introduced token objects for controlling the unlocking, will be used as a general concept in the future Main/Snapshot: snapshot deletion needed significant cleanups as it was still using many shortcuts, directly calling the API to lock media instead of using lock lists. Now much better, and the online snapshot deletion is also a lot cleaner as it no longer passes unnecessary parameters around which are already known in the machine/snapshot code Main/MediumLock: small improvements, now has a mode which skips locking already locked media, needed by the Snapshot code where we have overlapping lock lists and have to update the original one instead Main/Console+Session+Machine: follow-up changes for the online snapshot merging parameter passing simplification, plus an unrelated lock order violation fix in Machine which happens only for inaccessible machines Main/testcase: update correspondingly doc: update SDK reference

Config.kmk: new template for API client testcases Main/testcase: simplify it greatly by using templates, add a new testcase for medium locking