version 1.4 (prebid#162)

* version 1.4

Merge pull request prebid#161 from prebid/minor_fix_in_demo_app

fix demo app

Merge pull request prebid#144 from prebid/release_1.2

release 1.2 version update

Merge pull request prebid#128 from prebid/1.1.2_release

modified version number

Merge pull request prebid#115 from prebid/release_1.2

update versions for release 1.1.1

Release 1.1 (prebid#108)

* release 1.1

* update read me

release changes (prebid#83)

update release version (prebid#78)

New Release 0.5.1 (prebid#71)

* New Release 0.5.1

* Update build.gradle

* Update Settings.java

Release 0.5 (prebid#66)

* update version
* modify logutil