Move readme parts to their corresponding packages

config/README.md

@@ -0,0 +1,40 @@
+## Config
+
+Package config allows other packages to require a certain section of TOML 
+configuration file to be parsed into its internal configuration structure. Once
+config file is processed its values are distributed by the packages that 
+required them.
+
+```go
+import "github.com/localhots/gobelt/config"
+```
+
+Describe configuration structure inside a target package then call 
+`config.Require` from the init function of a package.
+
+> Note: subgroups are not currently supported. If a package is called `s3` and
+> located in `aws` parent package, call config section `aws_s3` instead of 
+> `aws.s3`. 
+
+```go
+package db
+
+var conf struct {
+    Flavor string `toml:"flavor"`
+    DSN    string `toml:"dsn"`
+}
+
+func init() {
+    config.Require("db", &conf)
+}
+```
+
+Load configuration from a `main` function of the app:
+
+```go
+package main
+
+func main() {
+    config.Load("config/config.toml")
+}
+```