Update README.md
add install notification
create base03, base04
create base03, base04
Revert "create base03, base04"

This reverts commit d4772d4a846206f5252e6877a6e1b9f2c4a20dc1.
Revert "Revert "create base03, base04""

This reverts commit 92bce80c4aa7d8836065351451c938ea3e97643c.
update Readme
Merge branch 'master' of https://github.com/kawasaki-n/java-base.git
example base01
example base02
example base03
example base04
Merge remote-tracking branch 'origin/kawasaki_n' into kawasaki_n