dev.md: added table of content, written installfile doc

doc/dev.md

@@ -1,5 +1,26 @@
 # init.sh developer's reference
 
+## Table of content
+  * [1. Getting started](#1-getting-started)
+  * [2. The aaa_error.sh file](#2-the-aaa_errorsh-file)
+    + [2.1. Functions](#21-functions)
+      - [2.1.1. check_root](#211-check_root)
+      - [2.1.2. die [--force] \<exitcode\>](#212-die---force-exitcode)
+      - [2.1.3. noerror [--noout] \<command\>](#213-noerror---noout-command)
+    + [2.2. Other functionalities](#22-other-functionalities)
+  * [3. The display.sh file](#3-the-displaysh-file)
+    + [3.1. Functions](#31-functions)
+      - [3.1.1. prnt [I|W|E|m] \<message\>](#311-prnt-iwem-message)
+    + [3.2. Other functionalities](#32-other-functionalities)
+  * [4. The filefct.sh file](#4-the-filefctsh-file)
+    + [4.1. Functions](#41-functions)
+      - [4.1.1. stdtime](#411-stdtime)
+      - [4.1.2. backupdist \<list_of_files_or_dirs\>](#412-backupdist-list_of_files_or_dirs)
+      - [4.1.3. installfile \<sources\> \<destination\>](#413-installfile-sources-destination)
+    + [4.2. Other functionalities](#42-other-functionalities)
+  * [5. The pkgman.sh file](#5-the-pkgmansh-file)
+
+
 ## 1. Getting started
 This is a developer's reference. It's not intended to be a manual, but a
 reference for all internal functions, so you can easily build your own modules.
@@ -111,4 +132,25 @@ exists, the function will issue a warning and continue to the next.
 The function don't take any other parameters than file and/or directory names.
 
 #### 4.1.3. installfile \<sources\> \<destination\>
+Install a list of file to the given destination. The source of the file can be
+of three different orrigins, from highest to lowest priority:
+ - **repo/hosts/$HOSTNAME**: this allows to provide system specific configuration
+files. Use only relative path to access the file.
+ - **repo/common**: this one will provide configuration files suitable for your
+entire infrastructure. Yet again provide a relative path to access it.
+ - **Any path**: You can give fully qualified path names to access resources
+from other locations.
 
+The priorities apply on file existance. Wildcards are not allowed in file names,
+so an error will occurs if you try to use any. It's also not yet possible to
+give an entire directory as a source.
+
+The last parameter is always the destination. If the path do not exists, it 
+will be created automatically.
+
+### 4.2. Other functionnalities
+That file don't profide any other things that the previously listed functions.
+
+## 5. The pkgman.sh file
+### 5.1. Functions
+#### 5.1.1. pkgupdt