Add and update module descriptions

modules/README.md

@@ -31,6 +31,16 @@ Dpkg
 
 Defines dpkg aliases and functions.
 
+Editor
+------
+
+Sets key bindings.
+
+Emacs
+-----
+
+Enables Emacs dependency management.
+
 Environment
 -----------
 
@@ -41,13 +51,19 @@ Fasd
 
 Maintains a frequently used file and directory list for fast access.
 
+Git
+---
+
+Enhances the Git distributed version control system by providing aliases,
+functions and by exposing repository status information to prompts.
+
 GNU Utility
 -----------
 
 Provides for the interactive use of GNU utilities on non-GNU systems.
 
 GPG
----------
+---
 
 Provides for an easier use of GPG by setting up gpg-agent.
 
@@ -61,16 +77,16 @@ Helper
 
 Provides helper functions for developing modules.
 
-History Substring Search
-------------------------
-
-Integrates zsh-history-substring-search into Prezto.
-
 History
 -------
 
 Sets history options and defines history aliases.
 
+History Substring Search
+------------------------
+
+Integrates zsh-history-substring-search into Prezto.
+
 Homebrew
 --------
 
@@ -142,10 +158,10 @@ Spectrum
 
 Provides for easier use of 256 colors and effects.
 
-SSH-Agent
----------
+SSH
+---
 
-Provides for an easier use of ssh-agent.
+Provides for an easier use of SSH by setting up ssh-agent.
 
 Syntax Highlighting
 -------------------