parser will now check to ensure time is valid
properly rejects when user inputs both time range and deadline
fixed undo command
Merge commit 'c4cc167d5df68ab7f656fd61dd1175d86b910550' into parser/Victor
Merge branch 'ui/victor' into parser/Victor
Fixed bug with error printing out two new lines
Added colouring for tags
#56 #48
Merge remote-tracking branch 'origin/ui/victor' into logic/wenhao