Fixed not retrieving speaker from database and changed conference strings

/res/layout/loading.xml: Commented out osbridge logo from being displayed.

/res/values/strings.xml: Changed strings to match sample json for WDCNZ conference instead of osbridge.

/src/org/osuosl/ocw/DataBaseHandler.java: Changed to raw query for getting a speaker row, don't know why normal query wasn't working yet.

/src/org/osuosl/ocw/Schedule.java: Wasn't correctly getting the row for speaker "id".

/src/org/osuosl/ocw/Speaker.java: Changed from declaring variables to instantiating global variables in constructor.
Merge branch 'feature-81' of https://github.com/markholland/ocw-android into feature-81