Release v1.0.1

• Fix tests; use previous symbol for missing ; (Weixuan Zhang)
• Clear canvas and console on new file load (Weixuan Zhang)
• Throw errors when scanner encounters invalid character (Weixuan Zhang)
• adjust caret positioning, add descriptive error messages (vnjaradi)
• Hide canvas and buttons if file has parse errors (Weixuan Zhang)
• Fix gui spacing; fix console font; change console position (Weixuan Zhang)
• fix error printing bugs (vnjaradi)
• Remove requiring definition file to be txt; other minor changes (Weixuan Zhang)
• Set max and min zoom & include 1 step lines (JeevanBhoot)