fixed problems around DriverTypeName

#10

add DriverTypeName.NULL

0.3.3

#8 DriverTypeName.NULL; v0.3.3

new method signatures that take DriverTypeName as param

#7

changed the package name

0.3.0

support Chrome Headless browser

publish README

0.2.0

Merge branch 'develop'

1st release

add openChromeDriverWithProfileDirectory(String directoryName) method…

… to the com.kazurayam.webdriverfactory4ks.ChromeDriverFactory class