[docs] now common website for all documentation - erpnext.org

docs/docs.dev.md

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+---
+{
+	"_label": "Developer API",
+	"_toc": [
+		"docs.dev.quickstart",
+		"docs.dev.framework",
+		"docs.dev.modules"
+	]
+}
+---
+### Is this for me?
+
+To starting hacking into ERPNext, you must have some understanding of how a dynamic web application works. There are hundreds of architectures and frameworks to make web development easier, but at the core there are a few elements that are important to understand.
+
+ERPNext is built on `wnframework` which is primarily developed for ERPNext but can be extended to make similar database driven applications. wnframework uses Python on the server-side and has a javascript based client for entering data, managing workflow and making reports.