[docs] new pages on doctype and markup

docs/user/knowledge/docs.user.knowledge.markdown.md

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+---
+{
+	"_label": "Format Using Markdown"
+}
+---
+
+Markdown is a simple way of writing text to format your content. Markdown allows you easy ways to format.
+
+1. Headings (h1 (largest), h2, h3, h4 and so on) 
+1. Paragraphs
+1. Lists (numbered or bulleted)
+1. Hyper links (links to other pages)
+1. Images 
+1. Code
+1. Embed HTML (HTML tags within your text)
+
+#### Headings
+
+Headings are specified by adding a `#` (hash) at the beginning of the line. The more the number of hashes, the smaller the heading:
+
+    # This is a large heading.
+
+    ### This is a smaller heading.
+
+#### Paragraphs
+
+To start a new paragraph, just make sure that there is an empty line at the beginning and end of the paragraph.
+
+To format text as **bold** or with _italics_ format as follows:
+
+    **This text** is **bold** and _this one_ is with _italics_
+
+#### Lists
+
+To define numbered lists, start your link with a number and a dot (.) and ensure there is a blank line before and after the list. The numbers are automatically generated so it does not matter what number you put:
+
+    1. list 1st item
+    1. second item
+    1. and so on
+    1. and so forth
+
+To define bulleted lists, start your items with a hyphen (-)
+
+    - item 1
+    - item 2
+    - item 3
+
+To nest lists within one another, put four spaces to indent your inner list as follows:
+
+    1. item 1
+    1. item 2
+        - sub item 1
+        - sub item 2
+    1. item 3
+
+#### Links (to other pages)
+
+Links to other pages can be defined by adding your text in box brackets [] followed by the link in round brackets ()
+
+    [This is an external link](http://example.com)
+    [A link within the site](my-page.html)
+
+#### Images
+
+Images can be added by adding an exclamation ! before the link.
+
+    ![A flower](files/flower.gif)
+
+
+#### Code
+
+To add a code block, just leave a blank line before and after the block and make sure all code line are indented by four spaces:
+
+    This is normal text
+        
+        This is a code block
+
+#### HTML
+
+You can embed any kind of HTML tags within your code. Any content written within HTML tags will not be formatted.
+
+[Detailed description of the markdown format](http://daringfireball.net/projects/markdown/syntax)
+   
+