doxygen: removing checked in artifacts
doxygen: adding amsmath as an extra latex package
doc: moved int_step documentation
doc: moved min and max documentation
added fitemnobody for items without a body
doc: updated functions doc for comparison operators
doc: updating fitemindexnobody
doc: reworded the comparison operators
doc: updated functions for boolean operators
doc: updated functions for logical functions
doc: updated functions for real-valued arithmetic operators
doc: updated functions for absolute value functions
doc: updated functions for rounding functions
doc: updated functions for power and logarithm functions
doc: updated functions for trigonometric functions
doc: fixed typos in functions
doc: updated functions for hyperbolic trigonometric functions
doc: updated functions for link functions
doc: updated functions for probability-related functions
doc: updated functions for combinatorial functions