Working on routine parsing
Working on routine parsing
Implemented the Routine class and routine name parsing in parser.cpp/.hpp
Added differentiate in routines.cpp
Added differentiate to routines.cpp
Implemented the unary minus and added continue; after each operator evaluation in eval_rpn
Improved formatting and added errors.h
Added support for scientific notation and fixed a bug about about skipping space in get_token
Added showrpn keyword to show rpn of expressions and that of stored functions
Returns NAN for divide by zero error and factorial of negative number.
Merge pull request #4 from sandesh-kalantre/sandesh

Sandesh:merged into master from sandesh.
Fixed in bug in routine name parsing
Fixed a bug in routine name parsing
Merge branch 'master' of https://github.com/sandesh-kalantre/NumCpp
Fixed a bug in routine name parsing
Fixed the subtraction bug
changes to diff fn in routines.cpp

I have edited the diff part in routines.cpp according to the format.
This will be a much older version though
Added ability to define ndArrays and see their contents
Implemented ability to define 1 dimensional linspaces
Implemented basic slicing