Introduce QR service (#2694)

* Introduce QR service

* Comply proxy-set help with functionality

Author: Mitko-Kerezov

docs/man_pages/general/proxy-set.md

@@ -3,13 +3,15 @@ proxy set
 
 Usage | Synopsis
 ------|-------
-General | `$ tns proxy set [<Hostname> [<Port><% if(isWindows) {%> [<Username> [<Password>]]<%}%>]]`
+General | `$ tns proxy set [<Url> <% if(isWindows) {%>[<Username> [<Password>]]<%}%>]`
 
 Sets proxy settings.
 
+### Options
+* `--insecure` - Allows insecure SSL connections and transfers to be performed. In case your proxy doesn't have a CA certificate or has an invalid one you need to use this flag.
+
 ### Attributes
-* `<Hostname>` the hostname of the proxy. If you do not provide this when running the command, the NativeScript CLI will prompt you to provide it.
-* `<Port>` the port of the proxy. If you do not provide this when running the command, the NativeScript CLI will prompt you to provide it.
+* `<Url>` the full url of the proxy. For example http://127.0.0.1:8888 If you do not provide this when running the command, the NativeScript CLI will prompt you to provide it.
 <% if(isWindows) {%>
 * `<Username>` and `<Password>` are your credentials for the proxy. These are not necessary, however if you provide a `<Username>` you need to provide a `<Password>` too.
 <% } %>

lib/common

@@ -62,6 +62,8 @@
     "plistlib": "0.2.1",
     "progress-stream": "1.1.1",
     "properties-parser": "0.2.3",
+    "qrcode-generator": "1.0.0",
+    "request": "2.81.0",
     "semver": "5.3.0",
     "shelljs": "0.7.6",
     "source-map": "0.5.6",
@@ -82,6 +84,7 @@
     "@types/chai-as-promised": "0.0.29",
     "@types/lodash": "4.14.50",
     "@types/node": "6.0.61",
+    "@types/request": "0.0.42",
     "@types/semver": "^5.3.31",
     "@types/source-map": "0.5.0",
     "chai": "3.5.0",