ReleaseNote.txt - Complex Library

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2018/04/02
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Revert double to float.

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2018/01/29
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Fixed c_sin, c_cos, c_sinh, c_cosh
They contained an invalid optimization.

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2018/01/25
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Issue found in version 0.1.9 - https://github.com/RobTillaart/Arduino/issues/90
Class does not compile for DUE and TEENSY

Apparently the name "Complex" is already in use (reserved) by some non-AVR compilers 
so it won't include the Complex.h file. Problem seen on Due and Teensy3.5

Solution:
- Make a copy of the Complex Library and rename the folder to CComplex 
- Rename Complex.h to CComplex.h
- Rename Complex.cpp to CComplec.cpp
- change one line in CComplex.cpp to include CComplex.h

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