Add gitignore file

Signed-off-by: Zachary Bush <zach@zmbush.com>
Merge pull request #9 from zmbush/gitignore

Add gitignore file
remove blank lines from .gitignore

Signed-off-by: Bob Copeland <bcopeland@gmail.com>
doc: make it clear this is a LastPass-sponsored project

There was some confusion as to whether lastpass-cli was officially
sanctioned.  Although it has been announced on the LastPass blog,
make it a bit more obvious by putting LastPass up top and author
credits at the end.

Signed-off-by: Bob Copeland <copeland@lastpass.com>
Merge https://github.com/lastpass/lastpass-cli