doc: Initial README with project goals

README.md

@@ -1,3 +1,25 @@
 # husht
 
 All the Rust, just with less syntax
+
+You can think of husht as a preprocessor for Rust, or as a
+indentation-significant "quiet syntax" language that compiles to Rust.
+In any case, the idea is that .hsh files will transform 1-1 into .rs files,
+and that all Rust language features will be available in a straightforward
+way in husht. Along the way, we will likely add some additional syntactic
+sugar in husht to easy some of the more common language patterns in Rust.
+In particular, we plan to add more familiar syntax for closures.
+
+One less common feature of husht is that we will maintain its ability to
+perform "disassembly" of Rust into recommended husht abbreviated form. Thus,
+one can test husht by performing round trips, and in particular, Rust ->
+husht -> Rust should have essentially the same behavior as prettyprinting the
+original Rust code with rustfmt.
+
+The base source code of husht is written in husht, but for (relatively clear)
+bootstrapping purposes, it ships with the transformed Rust, and one key
+end-to-end test is that the shipped husht code for husht indeed transforms
+into the Rust code.
+
+Documentation of specific syntax features of husht will be added as they are
+implemented.