initial commits

LICENSE

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+Copyright (c) 2017 Charles Iliya Krempeaux :: http://changelog.ca/
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# go-nul
+
+Package **nul** implements a **nullable** **optional-type**, for the Go programming language.
+
+In other programming languages, an **optional-type** might be know as: a **option-type**, or a **maybe-type**.
+
+## Documention
+
+Online documentation, which includes examples, can be found at: http://godoc.org/sourcecode.social/reiver/go-nul
+
+[![GoDoc](https://godoc.org/sourcecode.social/reiver/go-nul?status.svg)](https://godoc.org/sourcecode.social/reiver/go-nul)
+
+## Examples
+
+Here is an example **nullable** **optional-type** that can hold a string:
+```go
+import "sourcecode.social/reiver/go-nul"
+
+//
+
+var op nul.Optional[string] // the default value is nothing.
+
+// ...
+
+if nul.Nothing[string]() == op {
+	fmt.Println("nothing")
+}
+
+// ...
+
+op = nul.Null[string]()
+
+// ...
+
+if nul.Null[string]() == op {
+	fmt.Println("null")
+}
+
+// ...
+
+op = nul.Something("Hello world! 👾")
+
+// ...
+
+switch op {
+case op.Nothing[string]():
+	//@TODO
+case op.Null[string]():
+	//@TODO
+case op.Something("apple"):
+	//@TODO
+case op.Something("banana"):
+	//@TODO
+case op.Something("cherry"):
+	//@TODO
+default:
+	//@TODO
+}
+
+// ...
+
+value, found := op.Get()
+if found {
+	fmt.Println("VALUE:", value)
+} else {
+	fmt.Println("either nothing or null")
+}
+```