Add ignorecase option

cmd/micro/search.go

@@ -83,7 +83,10 @@ func Search(searchStr string, v *View, down bool) {
 	} else {
 		str = text[:searchStart]
 	}
-	r, err := regexp.Compile("(?i)" + searchStr)
+	r, err := regexp.Compile(searchStr)
+	if settings["ignorecase"].(bool) {
+		r, err = regexp.Compile("(?i)" + searchStr)
+	}
 	if err != nil {
 		return
 	}

cmd/micro/settings.go

@@ -75,6 +75,7 @@ func DefaultSettings() map[string]interface{} {
 		"colorscheme":  "default",
 		"tabsize":      float64(4),
 		"indentchar":   " ",
+		"ignorecase":   false,
 		"autoindent":   true,
 		"syntax":       true,
 		"tabsToSpaces": false,

runtime/help/help.md

@@ -182,6 +182,10 @@ Here are the options that you can set:
 
 	default value: ` `
 
+* `ignorecase`: perform case-insensitive searches
+
+	default value: `off`
+
 * `syntax`: turns syntax on or off
 
 	default value: `on`