Migrate to eslint

Summary
We'd like contributors to use the same linter and lint rules that we use
internally.  This diff swaps out eslint for jshint and fixes all lint failures
except for the max-len failures in the test suites.

Test Plan:
- ka-lint src
- make lint
- make test

Reviewers: emily

src/delimiter.js

@@ -144,7 +144,10 @@ var makeInner = function(symbol, font, mode) {
 var makeStackedDelim = function(delim, heightTotal, center, options, mode) {
     // There are four parts, the top, an optional middle, a repeated part, and a
     // bottom.
-    var top, middle, repeat, bottom;
+    var top;
+    var middle;
+    var repeat;
+    var bottom;
     top = repeat = bottom = delim;
     middle = null;
     // Also keep track of what font the delimiters are in
@@ -325,7 +328,7 @@ var stackLargeDelimiters = [
     "(", ")", "[", "\\lbrack", "]", "\\rbrack",
     "\\{", "\\lbrace", "\\}", "\\rbrace",
     "\\lfloor", "\\rfloor", "\\lceil", "\\rceil",
-    "\\surd"
+    "\\surd",
 ];
 
 // delimiters that always stack
@@ -334,12 +337,12 @@ var stackAlwaysDelimiters = [
     "\\Uparrow", "\\Downarrow", "\\Updownarrow",
     "|", "\\|", "\\vert", "\\Vert",
     "\\lvert", "\\rvert", "\\lVert", "\\rVert",
-    "\\lgroup", "\\rgroup", "\\lmoustache", "\\rmoustache"
+    "\\lgroup", "\\rgroup", "\\lmoustache", "\\rmoustache",
 ];
 
 // and delimiters that never stack
 var stackNeverDelimiters = [
-    "<", ">", "\\langle", "\\rangle", "/", "\\backslash", "\\lt", "\\gt"
+    "<", ">", "\\langle", "\\rangle", "/", "\\backslash", "\\lt", "\\gt",
 ];
 
 // Metrics of the different sizes. Found by looking at TeX's output of
@@ -390,7 +393,7 @@ var stackNeverDelimiterSequence = [
     {type: "large", size: 1},
     {type: "large", size: 2},
     {type: "large", size: 3},
-    {type: "large", size: 4}
+    {type: "large", size: 4},
 ];
 
 // Delimiters that always stack try the small delimiters first, then stack
@@ -398,7 +401,7 @@ var stackAlwaysDelimiterSequence = [
     {type: "small", style: Style.SCRIPTSCRIPT},
     {type: "small", style: Style.SCRIPT},
     {type: "small", style: Style.TEXT},
-    {type: "stack"}
+    {type: "stack"},
 ];
 
 // Delimiters that stack when large try the small and then large delimiters, and
@@ -411,7 +414,7 @@ var stackLargeDelimiterSequence = [
     {type: "large", size: 2},
     {type: "large", size: 3},
     {type: "large", size: 4},
-    {type: "stack"}
+    {type: "stack"},
 ];
 
 /**
@@ -535,5 +538,5 @@ var makeLeftRightDelim = function(delim, height, depth, options, mode) {
 module.exports = {
     sizedDelim: makeSizedDelim,
     customSizedDelim: makeCustomSizedDelim,
-    leftRightDelim: makeLeftRightDelim
+    leftRightDelim: makeLeftRightDelim,
 };