Fix bug in AndroidDevelopment guide

To apply a Scala Nature, the 'Configure' sub-menu must be used.
Adding the nature creates the 'Scala' sub-menu (which can then be used
to remove the Nature)
Merge pull request #72 from jamesbroadhead/master

Fix bug in AndroidDevelopment guide
Add documentation to new features introduced in the last weeks
Add section about missing 'tools.jar' on Linux systems
Merge pull request #73 from sschaef/new-feature-doc

Add documentation to new features introduced in the last weeks
Merge pull request #74 from sschaef/debugger-docu

Add section about missing 'tools.jar' on Linux systems
Added missing eclipse-juno profile to build section
Switchs to using the youtube videos

Adds support for a javascript splash screen.
Removed section about importing ``org.scala-ide.sbt.full.library`` project

There is really no need to import the ``org.scala-ide.sbt.full.library``
project in the workspace, hence I removed the section.
Added missing ``eclipse-juno`` profile in explanation of build.sh
Added new maven profile ``sbt-new``, which is needed because of
scala-ide/scala-ide@633e0fe41868b7a47842f5f9feaa815812840375
Merge pull request #75 from scala-ide/transient/update-doc-with-new-sbt-profile

Transient/update doc with new sbt profile
Added (long overdue) documentation about step filters.
Merge pull request #76 from dragos/rebased-step-filters

Added (long overdue) documentation about step filters.
Update scalainterpreter with new key combinations

With the multi-line evaluation field implemented by PR https://github.com/scala-ide/scala-ide/pull/489, the history and "do evaluation" keys have slightly changed (same as before + the need to hold CTRL).
Merge pull request #78 from jhaberstro/patch-2

Update scalainterpreter with new key combinations
Set sbt version in build.properties file to be 0.12.4

This is a good practice, and it avoids breaking the build if you have a 0.13.0
sbt-launcher.
Renamed image for find occurrences
Added short documentation for Type Hierarchy
Added changelog entried for 3.0.2-RC1