1.2.0

Features:

• Add a new type of cJSON item for raw JSON and support printing it. Thanks @loigu (#65, #90)

Fixes:

• Compiler warning if const is casted away, Thanks @gatzka (#83)
• Fix compile error with strict-overflow on PowerPC, (#85)
• Fix typo in the README, thanks @MicroJoe (#88)
• Add compile flag for compatibility with C++ compilers