Updating .gitignore

Signed-off-by: Tsuyoshi Ozawa <ozawa.tsuyoshi@gmail.com>
Ignoring target directory

Signed-off-by: Tsuyoshi Ozawa <ozawa.tsuyoshi@gmail.com>
Removing target from .gitignore

Signed-off-by: Tsuyoshi Ozawa <ozawa.tsuyoshi@gmail.com>
Merge pull request #128 from oza/ignoring-swapfile-and-intelljfiles

Updating .gitignore to ignore *.swp and intelliJ related files