add README

README

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++ emk
+
+A build system, including a fast embedded scripting language.
+
++ Installation
+
+Run 'make', followed by 'make install'
+
++ How it works
+
+The first task to run is parsing and preprocessing, where emk will parse an emkfile
+in the current working directory, include config.emk, and store variables in memory.
+
+emk will then run the modified emkfile through the interpreter.
+
++ How to write an emkfile
+
+emk has a small collection of reserved words:
+- include: instruct the preprocessor to include a file
+- declare: declare a variable
+- function: define a function (eg. build, install, etc)
+- if, then, else, while, for, do
+- echo: write to stdout
+
+An example of a good emkfile is shown below:
+
+	include ./config.emk;
+
+	declare PROGVER = "1.0";
+
+	function build {
+		echo "this function builds the program\n";
+	}
+
+	function install {
+		echo "this function installs the program\n";
+	}
+
+Lines must end with either semicolons (;) or braces ({})
+Variables can be called by prefixing '$' to the variable name. Ex:
+
+	declare MSG = "hi\n";
+
+	function build {
+		echo "$MSG";
+	}