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, 17 deletions

diff --git a/lexers/dsv.lua b/lexers/dsv.lua
deleted file mode 100644
index ad2b286..0000000
--- a/lexers/dsv.lua
+++ /dev/null
@@ -1,17 +0,0 @@
--- Copyright 2016 Christian Hesse
--- delimiter separated values LPeg lexer.
-
-local l = require('lexer')
-local token, word_match = l.token, l.word_match
-local P, R, S = lpeg.P, lpeg.R, lpeg.S
-
-local M = {_NAME = 'dsv'}
-
--- Operators.
-local operator = token(l.OPERATOR, S(',;:|'))
-
-M._rules = {
-  {'operator', operator}
-}
-
-return M