[doc] Hue 2.3 release
[site] Title Hue as an open source UI
[site] Fix grammar mistakes
[site] Adding link to blog
[site] Brand new site theme
[site] Fixed missing links
[site] Fixed logo link
[site] Fixed screenshot and typo
[site] Added video to the spot image
[site] Adding Impala App presentation
[site] Updated Impala app screenshot
[site] Fixed double slide of Shell
[hue-oozie] First 1.1 release
[site] Update package version
[search] Adding search app snippet
[doc] Adding 2.4 release and docs
[site] Pointing to 2.4 instead of 2.3
[site] Added mailing list subscribe field
[site] Download gives more options now
[site] Added HBase app and video gallery