Linguist refused to install with Visual Studio 2015 Community 2015 but changing some lines in the manifest file (source.extension.vsixmanifest) and recompiling seems to install it ok (it recognizes 68k asm correctly it seems):
<VisualStudio Version="14.0">
<Edition>Community</Edition>
<Edition>IntegratedShell</Edition>
<Edition>Express_All</Edition>
</VisualStudio>
</SupportedProducts>
<SupportedFrameworkRuntimeEdition MinVersion="4.5" MaxVersion="10.0" />