*improved API by replacing assertions with checking code;

*improved function calling of referenced usertype;
*updated the doc.

.gitignore

@@ -1,7 +1,7 @@
+/.vs/my_basic/v14
 /temp
 /my_basic.VC.db
 /my_basic.VC.VC.opendb
-/.vs/my_basic/v14
 *.DS_Store
 *.exp
 *.idb

HISTORY

@@ -1,3 +1,7 @@
+Feb. 22 2017
+Improved API by replacing assertions with checking code
+Improved function calling of referenced usertype
+
 Feb. 16 2017
 Improved meta function
 
@@ -741,7 +745,7 @@ Added code line inserting/removing to interpreter shell
 Changed mb_dispose_value as public
 
 Apr. 23 2015 Version 1.1
-Added debug APIs
+Added debug API
 Added (nestable) multiple line IF statement support
 
 Apr. 15 2015

README.md

@@ -42,6 +42,10 @@ It fits well on a large scale of Workstation, PC, Tablet, Pad, Mobile Phone, PDA
 
 There is an Arduino porting of the MY-BASIC interpreter, with a totally rewritten shell and user manual. Please see [MY-BASIC ARDU](https://my-basic.github.io/my_basic_ardu/).
 
+<a href="https://my-basic.github.io/my_basic_ardu/">
+<img src="https://github.com/paladin-t/my_basic/wiki/img/logo_arduino.svg" width="64">
+</a>
+
 ## Main features
 
 MY-BASIC is a dynamic typed programming language with BASIC syntax and has a very dynamic nature; it makes it flexible and easy to use. MY-BASIC offers a wide range of features including:
@@ -194,3 +198,9 @@ The [MY-BASIC Quick Reference](MY-BASIC%20Quick%20Reference.pdf) includes most o
 ## Support MY-BASIC development/List of donors
 
 You can support MY-BASIC development with a [donation](http://paladin-t.github.io/my_basic/donate.html).
+
+<a href="http://paladin-t.github.io/my_basic/donate.html">
+<img src="https://github.com/paladin-t/my_basic/wiki/img/button_donate.png" width="128">
+</a>
+
+Or see the [list of donors](http://paladin-t.github.io/my_basic/donate.html).