release v2.2

Merge pull request alt-romes#61 from DevManu-de/master

Implementation of x as hex notation alt-romes#60

Merge pull request alt-romes#57 from DevManu-de/master

Added previously removed sweepline

Merge pull request alt-romes#56 from alt-romes/parser

Expressions with priorities and testing

Merge pull request alt-romes#39 from Mango0x45/master

Remove redundant declarations allowing gcc to compile

set no-operation = NULL, and set operations as static in operations.c

Merge pull request alt-romes#26 from alt-romes/inlinemath

Implement inline-math with an arbitrary number of operators

Merge pull request alt-romes#19 from alt-romes/history

History

remove debug

remove debug