ENYO-1269: fixed array concatenation

concat returns the new array. Hence the concatenated array was lost.

Here a push must be used to update inplace the targer array
ENYO-1269-2: update enyo so Blob works with oldish firefox
ENYO-1269-2: remove dead code
ENYO-1269-2: tweak createFile FormData when running in Firefox

Moved firefox tweak code from putFile (where it was not
needed since the file name is passed in inFileId) to createFile.
Actually pass the filename in this new field.
ENYO-1269-2: Merge branch 'master' into ENYO-1269-2
Merge branch 'ENYO-1269-2' of github.com:enyojs/ares-project into ENYO-1872