prevent misrecognition of permuted combinations of 'e' and 'pi'

Merge pull request #8 from rohit-rao/snprintf

Updates from sprintf() to snprintf().

Update to v1.0.1

fix implementations of logical not and bitwise not

[bug-fix] : decimal number with signed exponent

[bug fix] : Seg. fault on using cpp strings

update version to 1.0.0

fix clang warnings

remove sci2dec token AND rm '_'(underscore) from symbols of 'pi' and 'e'

Update functions.h

stoic mode

fix clang warnings/errors

use ceval in stoic mode to supress all the error messages

[bug fix]: inequality operators not working properly