Update README with Reason dependencies

Reviewed By: phooji

Differential Revision: D3312652

fbshipit-source-id: cca0282

INSTALL.md

@@ -19,6 +19,7 @@ release](http://fbinfer.com/docs/getting-started.html) (faster), or to
 compile everything from source (see the end of this document).
 
 - opam >= 1.2.0 (instructions [here](https://opam.ocaml.org/doc/Install.html#OSX))
+- reason >= 0.0.5 ([installation](https://github.com/facebook/reason/blob/master/README.md))
 - Python 2.7
 - Java (only needed for the Java analysis)
 - clang in Xcode command line tools. You can install them with the command

infer/src/IR/README.md

@@ -2,11 +2,11 @@
 
 The Intermediate Representation is a format used by the back-end for analysis. It is produced by one of the front-ends, one for each program analyzed.
 
-The main entry point is the intermediate language in [Sil](sil.rei).
+The main entry point is the intermediate language in [Sil](Sil.rei).
 
-The control flow graph module is [Cfg](cfg.rei).
+The control flow graph module is [Cfg](Cfg.rei).
 
-The call graph module is [Cg](cg.rei).
+The call graph module is [Cg](Cg.rei).
 
-The type environment module is [Tenv](tenv.rei).
+The type environment module is [Tenv](Tenv.rei).