v3.7 :

- Empty function managed
- Fix big decimal usage for functions

v3.6 :

- Add round, ceil and floor functions

Bugs fixed :

- Operator factory couldn't be taken into account using the Shared Context

v3.5 :

Bugs fixed :

- Multiple evaluations for the same expression

v3.4 :

- Inner stack increased to 2048 for big expressions
- Access to the error column and line

Bugs fixed :

- Error location for semantic cases fixed
- Symbol value returning a vector was not taken into account
- Precedence for AND, OR operators fixed