Nanoscipy

Added more natural constants.
Fixed natural constant implicit multiplication with parentheses and numbers.
Fixed issue with float_to_int() with scientific notation.

Added replace() to util.
Added symbol conversion to cprint in parser

mathpar hotfix

mathpar
Added new features for .parser():
Now supports factorial operations.
Added deg() and rad() functions to support conversion from radians to degrees and vice versa, respectively.
Added print option.
Added support for natural constants with the usage of an '_'. E.g., '_NA' for Avogadro's number.

Fixes for .parser()
Fixed inverse trigonometric functions.
Fixed an issue in which calculations of type (x)^(y) did not work.
Defined sin(*n*pi) = sin(-*n*pi) = 0 for n = 0, 1, 2, ...

functions
Added multi_plot()
Serves as the better replacement for multiplot figures for data_plot()

util
New module containing all the utility functions of nanoscipy

modules
Fixed operation display selection for mathop and locate

Added quick save option for DatAn.plot()

Optimizations and bug fixes to mathpar.parser(). Added find() function (improved native index function). Implemented parser in DatAn.mathop()