Added an overview to the docs

docs/command-line-script.md

@@ -1,9 +1,3 @@
-Included with ChromaTerm is a command line script, called `ct`, that can be used
-to color the output of your programs according to user-configurable rules. You
-can use the script to consistently highlight keywords across different programs.
-
-Think of `ct` like `grep`; just pipe data into it. It even works with interactive applications, like `ssh`.
-
 ## Usage
 
 Run any program and pipe it into `ct`, like so:

docs/index.md

@@ -1 +1,22 @@
-TODO
+[![Build status](https://travis-ci.com/hSaria/ChromaTerm.svg?branch=master)](https://travis-ci.com/hSaria/ChromaTerm)
+[![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/hSaria/ChromaTerm.svg)](https://lgtm.com/projects/g/hSaria/ChromaTerm/context:python)
+[![Coverage status](https://coveralls.io/repos/github/hSaria/ChromaTerm/badge.svg)](https://coveralls.io/github/hSaria/ChromaTerm)
+[![PyPI version](https://badge.fury.io/py/chromaterm.svg)](https://badge.fury.io/py/chromaterm)
+
+ChromaTerm is a utility for coloring output meant for terminals. You can interact
+with it using a command line script and through an API.
+
+## [Command Line Script](./command-line-script)
+
+Included with ChromaTerm is a command line script, called `ct`, that can be used
+to color the output of your programs according to user-configurable rules. You
+can use the script to consistently highlight keywords across different programs.
+
+Think of `ct` like `grep`; just pipe data into it. It even works with interactive
+applications, like `ssh`.
+
+## [API](./api/introduction)
+
+If you have a Python module the output of which is meant for terminals, you may
+be interested in extending it through ChromaTerm's API to highlight significant
+output.