Profile fetcher selection and new initials avatars

Review: https://reviews.apache.org/r/19116/
Fix for missing dependency in dist-server

https://reviews.apache.org/r/20209/
Fix for gadget proxy request URI

https://reviews.apache.org/r/20207/
Added Atmosphere framework as replacement of Socket.IO by Pablo Ojanguren. Fix for #WAVE-405.

https://reviews.apache.org/r/19355/
Added atmosphere to classpath
Removing old dependency with socketio-java

https://reviews.apache.org/r/20610/
Adds Profiling. https://reviews.apache.org/r/22776
Fixes Eclipse classpath to use GWT 2.6.1 libraries.
Fixes unstable test in RpcTest.
Adds .DS_Stire ti .gitignore.
Updates release-bin to run without tests and to include server-config.xml.
Updates release-bin so it will auto generate default server.config and add to distribution.
Fixes server.config generation for release-bin.
Improves/refactors profiling code. https://reviews.apache.org/r/23166/
Deltas migration tool from file to mongodb store https://reviews.apache.org/r/20371