add .gitignore

Signed-off-by: Cristian Stoica <crististm@gmail.com>
chapter 1 upto 1.16

Signed-off-by: Cristian Stoica <crististm@gmail.com>
update code for chapter 1

Signed-off-by: Cristian Stoica <crististm@gmail.com>
fix a bug; rename

Signed-off-by: Cristian Stoica <crististm@gmail.com>
add some missing pieces

Signed-off-by: Cristian Stoica <crististm@gmail.com>
something important was missing as well

Signed-off-by: Cristian Stoica <crististm@gmail.com>
execute first chapter interpreter

Signed-off-by: Cristian Stoica <crististm@gmail.com>
have a decent prompt

Signed-off-by: Cristian Stoica <crististm@gmail.com>
start working on ex 1.7