Update acknowledgements

Author: danielaparker

acknowledgements.md

@@ -2,30 +2,30 @@ A big thanks to the following individuals for contributing:
 
 - Andrew Hutko (early code review)        
 
-- Marc Chevrier (contributed clang port, build files, json is<T> and as<T> methods, 
+- [Marc Chevrier](https://github.com/MarkaPola) (contributed clang port, build files, json is<T> and as<T> methods, 
 and make_array template implementation.)
 
-- Pedro Larroy and the developers of the clearskies_core project (contributed build 
+- [Pedro Larroy](https://github.com/larroy) and the developers of the clearskies_core project (contributed build 
 system for posix systems, adding GCC to list of supported compilers, bug fixes, 
 Android fix)
 
 - [Cory Fields](https://github.com/theuni) for fixing warnings about unused variables
 
-- Vitaliy Gusev (reported error in json object operator[size_t i])
+- [Vitaliy Gusev](https://github.com/gusev-vitaliy) (reported error in json object operator[size_t i])
 
 - [Alex Merry](https://github.com/amerry) for reporting errors with "typename" keyword experienced with gcc and providing 
 workaround for gcc 4.8 regex issues.
 
-- Ignatov Serguei (reported issues experienced with gcc for 0.95 and 
+- [Ignatov Serguei](https://github.com/sergign60) (reported issues experienced with gcc for 0.95 and 
 0.96 candidate and helped fix them)
 
 - [Milan Burda](https://github.com/miniak) for fix for clang build error
 
 - [Peter Tissen](https://github.com/Bigpet), for reporting and suggesting a fix for get(name,default_val)
 
-- Tom Bass for assistance with clang build errors
+- [Tom Bass](https://github.com/tbass) for assistance with clang build errors
 
-- Andrey Alifanov and Amit Naik for failing test cases for JSON Path
+- [Andrey Alifanov](https://github.com/AndreyAlifanov) and [Amit Naik](https://github.com/amitnaik1) for failing test cases for JSON Path
 
 - [Yuri Plaksyuk](https://github.com/yplaksyuk) for contributing an extension to JsonPath to allow filter 
 expressions over a single object. 
@@ -39,7 +39,7 @@ against an empty object
 
 - [Alexander](https://github.com/rog13) for contributing fix to jsonpatch::diff
 
-- Stefano Sinigardi for contributing workaround for vs2017 platform issue
+- [Stefano Sinigardi](https://github.com/cenit) for contributing workaround for vs2017 platform issue
 
 - [xezon](https://github.com/danielaparker/jsoncons/pull/140) for proposing decode_csv and encode_csv functions, the
 ignore_empty_lines option, and fixes to mismatched allocator types. Also for fixes and improvements in string_view code.