Added getSteamLevel method (with callback) and steamLevels event
Updated readme
Removed redundant steamLevels event
Updated readme
Accept SteamIDs instead of account IDs
Updated readme
Updated readme to reflect that callback is required for getSteamLevel
SteamID not Steam ID
Fixed indentation
Added missing semicolon
account IDs -> SteamIDs
Merge pull request #81 from DoctorMcKay/steam-level

Add ability to get Steam levels for specified accounts