Use tags-table-list instead of tags-file-name

[davidsiefert]

This way I can jump not only in the file I'm in, but to the library sources as well...

[chrisdone]

Neat!

[davidsiefert]

Sorry man, looks like I broke the build.... will figure it out...

[gracjan]

@davidsiefert: for your convenience:

In toplevel form:
haskell-commands.el:636:32:Error: malformed let binding: 
    `(add-to-list (quote tags-table-list) (haskell-session-tags-filename (haskell-process-session (car state))))'
make: *** [haskell-commands.elc] Error 1

[gracjan]

@davidsiefert: is it working better now?

[gracjan]

@davidsiefert: is it working better now?

[lukehoersten]

Fixed in #592

[davidsiefert]

Sorry for my inactivity--I never got a chance to look into this. Thanks for taking ownership and adding this feature! You guys rock!