Move all lua related files to lua/ subfolder

Also remove the lexers sub directory from the Lua search path.
As a result we attempt to open fewer files during startup:

 $ strace -e open -o log ./vis +q config.h && wc -l log

In order to avoid having to modifiy all lexers which `require('lexer')`
we instead place a symlink in the top level directory.

 $ ./configure --disable-lua
 $ rm -rf lua

Should result in a source tree with most lua specifc functionality
removed.

1 files changed, 0 insertions, 21 deletions

diff --git a/lexers/litcoffee.lua b/lexers/litcoffee.lua
deleted file mode 100644
index f31a2d1..0000000
--- a/lexers/litcoffee.lua
+++ /dev/null
@@ -1,21 +0,0 @@
--- Copyright 2006-2013 Robert Gieseke. See LICENSE.
--- Literate CoffeeScript LPeg lexer.
--- http://coffeescript.org/#literate
-
-local l = require('lexer')
-local token = l.token
-local P = lpeg.P
-
-local M = {_NAME = 'litcoffee'}
-
--- Embedded in Markdown.
-local markdown = l.load('markdown')
-M._lexer = markdown -- ensure markdown's rules are loaded, not HTML's
-
--- Embedded CoffeeScript.
-local coffeescript = l.load('coffeescript')
-local coffee_start_rule = token(l.STYLE_EMBEDDED, (P(' ')^4 + P('\t')))
-local coffee_end_rule = token(l.STYLE_EMBEDDED, l.newline)
-l.embed_lexer(markdown, coffeescript, coffee_start_rule, coffee_end_rule)
-
-return M