Diff plugin makes a diff between a vector in Qgis and a text file
Find issues, codes & home page on gitHub
Version 1.0 tested on Qgis 2.12 on Fedora & 2.8 on Windows 7 : accepted in Qgis repo
Version 2.0 tested on Qgis 2.14 on Fedora & 2.14 on Windows 7 : proposed to Qgis repo