Create Parser.cpp

This contains the function that tokenizes the input from the user
Finished the create table function and wrote close, open, and show functions in parser class
just finished insertinto function that works
wrote lil bit about expresson
all the query and command functions are integrated with parser besides the one that uses conditions
gitignore
Merge remote-tracking branch 'origin/richa_parser'

Conflicts:
	.gitignore