Update README

README.md

@@ -1,22 +1,24 @@
 # Schala - a programming language meta-interpreter
 
 Schala is a Rust framework written to make it easy to create and experiment
-with multipl toy programming languages. It provides a cross-language REPL and
+with multiple toy programming languages. It provides a cross-language REPL and
 provisions for tokenizing text, parsing tokens, evaluating an abstract syntax
-tree, and other tasks that are common to all programming languages, as well as sharing state
-between multiple programming languages.
+tree, and other tasks that are common to all programming languages, as well as
+sharing state between multiple programming languages.
 
-Schala is implemented as a Rust library `schala-repl`, which provides a
-function `start_repl`, meant to be used as entry point into a common REPL or
-non-interactive environment. Clients are expected to invoke `start_repl` with a
-vector of programming languages. Individual programming language
-implementations are Rust types that implement the
-`ProgrammingLanguageInterface` trait and store whatever persistent state is
-relevant to that language. 
+Schala is implemented as a Rust library `schala-repl`, which provides a `Repl`
+data structure that takes in a value implementing the
+`ProgrammingLanguageInterface` trait. Individual programming language
+implementations are Rust types that implement `ProgrammingLanguageInterface`
+and store whatever persistent state is relevant to that language. 
 
-Run schala with: `cargo run`. This will drop you into a REPL environment.  Type
-`:help` for more information, or type in text in any supported programming
-language (currently only schala-lang) to evaluate it in the REPL.
+
+## Running
+
+Run schala with the normal `cargo run`. This will drop you into a REPL
+environment.  Type `:help` for more information, or type in text in any
+supported programming language (currently only `schala-lang`) to evaluate it in
+the REPL.
 
 ## History
 
@@ -61,35 +63,28 @@ of learning how to write a programming language.
 
 ### General
 
-http://thume.ca/2019/04/18/writing-a-compiler-in-rust/
+* http://thume.ca/2019/04/18/writing-a-compiler-in-rust/
 
 ### Type-checking
-https://skillsmatter.com/skillscasts/10868-inside-the-rust-compiler
-https://www.youtube.com/watch?v=il3gD7XMdmA
-http://dev.stephendiehl.com/fun/006_hindley_milner.html
-https://rust-lang-nursery.github.io/rustc-guide/type-inference.html
-
-https://eli.thegreenplace.net/2018/unification/
-https://eli.thegreenplace.net/2018/type-inference/
-http://smallcultfollowing.com/babysteps/blog/2017/03/25/unification-in-chalk-part-1/
-http://reasonableapproximation.net/2019/05/05/hindley-milner.html
+* https://skillsmatter.com/skillscasts/10868-inside-the-rust-compiler
+* https://www.youtube.com/watch?v=il3gD7XMdmA
+* http://dev.stephendiehl.com/fun/006_hindley_milner.html
+* https://rust-lang-nursery.github.io/rustc-guide/type-inference.html
+* https://eli.thegreenplace.net/2018/unification/
+* https://eli.thegreenplace.net/2018/type-inference/
+* http://smallcultfollowing.com/babysteps/blog/2017/03/25/unification-in-chalk-part-1/
+* http://reasonableapproximation.net/2019/05/05/hindley-milner.html
 https://rickyhan.com/jekyll/update/2018/05/26/hindley-milner-tutorial-rust.html
 
 ### Evaluation
-*Understanding Computation*, Tom Stuart, O'Reilly 2013
 
-*Basics of Compiler Design*, Torben Mogensen
+* _Understanding Computation_, Tom Stuart, O'Reilly 2013
+* _Basics of Compiler Design_, Torben Mogensen
 
 ### Parsing
-http://journal.stuffwithstuff.com/2011/03/19/pratt-parsers-expression-parsing-made-easy/
-https://soc.github.io/languages/unified-condition-syntax
-
-[Crafting Interpreters](http://www.craftinginterpreters.com/)
+* http://journal.stuffwithstuff.com/2011/03/19/pratt-parsers-expression-parsing-made-easy/
+* https://soc.github.io/languages/unified-condition-syntax
+* [Crafting Interpreters](http://www.craftinginterpreters.com/)
 
 ### LLVM
-http://blog.ulysse.io/2016/07/03/llvm-getting-started.html
-
-###Rust resources
-https://thefullsnack.com/en/rust-for-the-web.html
-
-https://rocket.rs/guide/getting-started/
+* http://blog.ulysse.io/2016/07/03/llvm-getting-started.html