some changes in neditable
Merge remote-tracking branch 'upstream/master'

Conflicts:
	ninja_ide/core/file_handling/nfile.py
Merge pull request #1373 from diegosarmentero/master

some changes in neditable
Upgraded nvfs to be more usable and to be used instead of nfile for
direct access to files
Added basic incomplete tests for nvfs, corrected some tests to nfil and
corrected bugs detected in nfilesystem