Improve syntax and runtime error messages

[ckski]

Currently the following code:

%%ignite

if True:
    pass
else False:
    pass

Results in the following error:
Error: invalid syntax (<string>, line 4)

This is confusing because the error is actually on line 5 (%%ignite does not get counted).
Ideally we want this to be similar to full python error message which shows the position of the syntax error also.

 File "<stdin>", line 3
    else False:
         ^
SyntaxError: invalid syntax

Acceptance:

• Syntax error message shows correct line number (1 line after started #)
• Syntax error message shows the position of where the syntax error starts
• unit test(s)

See comments for advice

[ckski]

A suggestion for implementing this is to use traceback.format_exc() which returns a string with the exception formatted. The file name can be removed and the line number must be incremented by one.