eldoc highlight args, part 1
initial version of eldoc argument highlighting
Fix typo
use the comment font face for the output cleared text
use clojure-mode to display the source code of functions
Fix dir local variables for nrepl-mode buffer.
Fix issue #124.

It will raise ``No namespace`` exception instead of NPE, if current buffer
is not loaded. And it can find definitions recursivery, which @joegallo
commented.
Merge pull request #188 from bbatsov/output-cleared-face

Use the comment font face for the output cleared text
Merge pull request #190 from bbatsov/clojure-src

Use clojure-mode to display the source code of functions
Merge pull request #193 from cola-zero/fix-nrepl-jump

Fix issue #124.
Use ns-resolve for jump-to-def.
Remove leading slash from filenames for nrepl-jump.
Fix message formatting (fixes issue #195).