import eclipse workspace
use char literals
add modulo function to calc()
effing eclipse
fix calc(std::istream&)
don't track Debug/

Also, clean up .gitignore files. Effing eclipse.
don't track test result
fix style
use clearer naming
get rid of unnecessary #include
more concise style, full variable name where it makes sense
add documentation
implement interactive calculator
ignore calculator/Debug/
update README