Improve capitalization and add developer information of PRIMA (#290)

Author: zaikunzhang

NOTICE

@@ -55,7 +55,8 @@ License at <https://github.com/chokkan/liblbfgs/blob/master/COPYING>
 
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-Prima - BSD 3-Clause 
+PRIMA - BSD 3-Clause
+Developed by Zaikun Zhang and contributors based on the works of M.J.D. Powell.
 <https://github.com/libprima/prima>
 
 License at <https://github.com/libprima/prima/blob/main/LICENCE.txt>