temp
refactored: migration runner and fluent api added
AT #2 passed - with content
ready for AT#3, #4
trying to use umbraco services without caching;
small refactoring: migration runner; move property up fluent extensions
Move Property Down added
RepublishAllContent magic finally removed
good start point for AT
tab handling - ready for testing
tested and fixed transactions handling
preview file removed
Emulation mode added (all migrations executed, but transaction is rolled back instead of commit aftewards)
added log/error messages to tab processing; fixed case when tab exists
added information about migration steps application to the umbraco database; unused things removed from code
Merge branch 'feature/core' into develop