Add check on android SDK location to prevent NPE.

androidSdk can be null if ANDROID_HOME is not defined, so the
extra check prevents an NPE.
Also added the location of the SDK in the error message when
the location does not exist.
Merge pull request #73 from ducrohet/androidSdk

Add check on android SDK location to prevent NPE.
Display device details on the device page.
Merge pull request #75 from square/jw/device-deets

Display device details on the device page.
Update change log.
Update change log for 1.0.3.
[maven-release-plugin] prepare release 1.0.3
[maven-release-plugin] prepare for next development iteration
Update jQuery Maven plugin to latest to fix URL bug.
Merge pull request #77 from square/jw/update-plugin

Update jQuery Maven plugin to latest to fix URL bug.