File Class refactoring (WIP)
merge
new File: something
update UrlFile to new File API
new File API: UploadedFile
new File API: fixes
new File API: fixes
new File API: fixes
save full cdn url in UploadedFile
File API fixes
InputFile with new File API
fileFrom always returns File
file as second argument in File::upload.progress callback
don't change `value` when File created from that `value`
micro fix in Base File class
simplify cdn-url modifiers regexp
error messages
Merge pull request #30 from uploadcare/new_shiny_File

File Class refactoring