Added a shellcheck(1) man page

The manual is mainly a copy/paste from the current documentation. It is
builded with pandoc, and written in markdown.

closes #50

.gitignore

@@ -3,4 +3,5 @@
 .tests
 jsoncheck
 shellcheck
+shellcheck.1
 dist

Makefile

@@ -2,7 +2,7 @@
 
 GHCFLAGS=-O9
 
-all: shellcheck .tests
+all: shellcheck .tests shellcheck.1
 	: Done
 	
 shellcheck: regardless
@@ -13,6 +13,9 @@ shellcheck: regardless
 	: Running unit tests
 	./test/runQuack && touch .tests
 
+shellcheck.1: shellcheck.1.md
+	pandoc -s -t man $< -o $@
+
 clean:
 	rm -f .tests shellcheck *.hi *.o  ShellCheck/*.hi ShellCheck/*.o
 	rm -rf dist

shellcheck.1.md

+% SHELLCHECK(1) Shell script analysis tool
+
+# NAME
+
+shellcheck - Shell script analysis tool
+
+# SYNOPSIS
+
+**shellcheck** [*OPTIONS*...] *FILES*...
+
+# DESCRIPTION
+
+ShellCheck is a static analysis and linting tool for sh/bash scripts. It's
+mainly focused on handling typical beginner and intermediate level syntax
+errors and pitfalls where the shell just gives a cryptic error message or
+strange behavior, but it also reports on a few more advanced issues where
+corner cases can cause delayed failures.
+
+# OPTIONS
+
+**-f** *FORMAT*, **--format=***FORMAT*
+
+:    Specify the output format of shellcheck, which prints its results in the
+     standard output. Subsequent **-f** options are ignored, see **FORMATS**
+     below for more information.
+
+**-e**\ *CODE1*[,*CODE2*...],\ **--exclude=***CODE1*[,*CODE2*...]
+
+:    Explicitly exclude the specified codes from the report. Subsequent **-e**
+     options are cumulative, but all the codes can be specified at once,
+     coma-separated as a single argument.
+
+# FORMATS
+
+**tty**
+
+:    This is the default format, a plain text output. If your terminal handles
+     colors, messages are printed with a different color depending on their
+     types (error, warnings etc). You get a pretty terminal frontend.
+
+**gcc**
+
+:    This format outputs messages similar to those from gcc.
+
+     `<file>:<line>:<column>: <type>: <message>`
+
+**checkstyle**
+
+:    Checkstyle is a development tool to help programmers write Java code that
+     adheres to a coding standard. Checkstyle reports are XML files that can
+     be integrated with a wide range of tools from text editors to continuous
+     integration platforms.
+
+```
+<?xml version='1.0' encoding='UTF-8'?>
+<checkstyle version='4.3'>
+  <file name='file'>
+    <error
+      line='line'
+      column='column'
+      severity='severity'
+      message='message'
+      source='ShellCheck.SC####' />
+    ...
+  </file>
+  ...
+</checkstyle>
+```
+
+**json**
+
+:    Json is a popular serialization format that is more suitable for web
+     applications. ShellCheck's json is compact and contains only the strict
+     minimum.
+
+```
+[
+  {
+    "line": line,
+    "column": column,
+    "level": level,
+    "code": ####,
+    "message": message
+  },
+  ...
+]
+```
+
+# SEE ALSO
+
+sh(1) bash(1)