Nailgun fix

Fix an issue where Nailgun integration wasn't working due to how "current working directory" works with Nailgun.

Fix issue with non-alphanumeric tags

Fixes an issue with tags generated for symbols which are regex symbols (ie *).

Thanks @drxcc .

Fix issue with tags for macros

Fixed an issue where tags were not generated for macros.

0.3.0: New address!

#7: Changes the form of the address. Instead of using call cursor (which is brittle when the file changes), it uses /search/ along with \zs to place the cursor in the correct place.

#8: All implicit things are now added as static (when clashing, priority is given to the non-implicit tag). Implicit things (val, def, class and object) are rarely accessed via their tokens (using <C-]>) since they are often simply proofs for typeclasses and the like.