adding json & xml modules; update all table of contents links for remaining sections

Author: symonk

README.md

@@ -70,8 +70,33 @@ go run . -module closingchannels
 * [48 - String Formatting](stringformatting/main.go)
 * [49 - Text Templating](texttemplates/main.go)
 * [50 - Regexp](regex/main.go)
-* [77 - Contexts](contexts/main.go)
-* [78 - Spawning Processes](spawningprocesses/main.go)
-* [79 - Execing Processes](execingprocesses/main.go)
-* [80 - Signals](signals/main.go)
-* [81 - Exit](exit/main.go)
+* [51 - Json](json/main.go)
+* [52 - Xml](xml/main.go)
+* [53 - Time](time/main.go)
+* [54 - Epoch](epoch/main.go)
+* [55 - Time Formatting](timeformatting/main.go)
+* [56 - Random Numbers](randomnumbers/main.go)
+* [57 - Number Parsing](numberparsing/main.go)
+* [58 - URL Parsing](urlparsing/main.go)
+* [59 - SHA256 Parsing](sha256/main.go)
+* [60 - Base64 Encoding](base64/main.go)
+* [61 - Reading Files](readingfiles/main.go)
+* [62 - Writing Files](writingfiles/main.go)
+* [63 - Line Filters](linefilters/main.go)
+* [64 - File Paths](filepaths/main.go)
+* [65 - Directories](directories/main.go)
+* [66 - Temporary Files & Directories](temporaryfiledirs/main.go)
+* [67 - Embed Directive](embedding/main.go)
+* [68 - Testing & Benchmarking](testingbenchmarking/main.go)
+* [69 - Command Line Arguments](cli/main.go)
+* [70 - Command Line Flags](clf/main.go)
+* [71 - Command Line Subcommands](cls/main.go)
+* [72 - Environment Vars](environment/main.go)
+* [73 - Logging](logging/main.go)
+* [74 - HTTP Client](httpclient/main.go)
+* [75 - HTTP Server](httpserver/main.go)
+* [76 - Contexts](contexts/main.go)
+* [77 - Spawning Processes](spawningprocesses/main.go)
+* [78 - Execing Processes](execingprocesses/main.go)
+* [79 - Signals](signals/main.go)
+* [80 - Exit](exit/main.go)

json/main.go

@@ -0,0 +1,5 @@
+package json
+
+func Run() {
+
+}

xml/main.go

@@ -0,0 +1,5 @@
+package xml
+
+func Run() {
+
+}