Update 'Functions and Methods'

Functions-and-Methods.md

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+# Syntax
+```
+func ro someFunction
+	@ reciever:SomeObject
+	> input:Int
+	< output:Int:mut 
+	---
+	somePhrase
+```
+
+Function sections are divided in two. The first part can contain inputs, outputs, and a method reciever. Inputs are preceded by a '>', outputs are preceded by a '<', and the method reciever is preceded by a '@'. Function outputs can have default values, whether they be simple or complex.
+
+The latter part contains the actual code of the function, which is composed of [phrases](Phrases).
+
+# Semantics
+A function may have any number of inputs and outputs, and they act as local variables. Function inputs
+must always be immutable, and function outputs must always be mutable.
+
+The second part is the actual code of the function. It is separated from the
+first part of the function with a separator token, and contains an indented
+block of phrases.
+
+To return data from a function, its outputs must be set as you would a normal
+variable.
+
+A function can be a method of an object if it lists the method receiver. If it doesn't, it is just a regular function
+
+Method receivers, like inputs, must be immutable. They also must be pointers.
+It is important to note that if a pointer is immutable, the pointer cannot
+"move", but the data it points to can still be altered.
+
+Method receivers can be of any type defined in the same module except interface
+types.