convertFromUTF8ToUTF32

convert utf8 to utf32 and and vice versa , from utf8 to utf16 and vice versa, using icu library.

first:

you have to install icu library
sudo apt-get install libicu-dev

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for more information : visit http://userguide.icu-project.org/
and icu api http://icu-project.org/apiref/icu4c/index.html