v1.3

Major Changes

• Implement getAt()
• getAt() alternative [] overload for use in c++
• Expose freeCtring()

Full Changelog: v1.2...v1.3

refactor & rename symbols to Ctring

Change done to avoid conflicts with well-know preexisting libraries

Bug Fixes relating to NULL & insert()

handle NULL and insert(pos > str->len)

null handled in everything i could think of rn

v1.0

Create README.md