Merge pull request #6 from kevlar1818/master

Added cmd_price(), cmd_costall()
Slight style fix.
Modified command prompt.
Add deck file as an optional argument and make NUM parameters optional to add/rm commands.
Cost doesn't crash if it can't find the price of a card.
Add ability to mark cards with stars/symbols.
Improved help command.
Small style fixes.
Disabled price commands because the scraped site changed.
Added a space in the output of cdist and csdist.
Fixed tab completion for commands.
Added tutorial command and fixed prob bug with uppercase card names.
Added in-depth command help.
Optional arg docstring on one line for consistency.
Support snow permanent symbol.
Fixed a bug where removing a card with capital letters in it caused a crash
Fixed a similar bug from before for siderm
Merge pull request #14 from huangkev/master

Minor fixes to rm and siderm