Scala-ide for eclipse installation

官方指导地址：http://scala-ide.org/docs/user/gettingstarted.html

最新版本地址：http://download.scala-ide.org/releases-29/stable/site

Requirements
the Java Development Kit, version 1.5.0 or newer. We recommend the latest 1.6.x version, there have been issues reported when using Eclipse and Java 7.
Eclipse, including the JDT. Either the “Classic” or “Eclipse for Java Developers” is sufficient. Scala IDE can be installed on both Eclipse 3.6 (Helios) and Eclipse 3.7 (Indigo). There is one known issue specific to using Scala IDE on Indigo, releated to tests discovery (ticket 10007821).

Scala IDE for Eclipse is best installed (and updated) directly from within Eclipse.

This is done by using Help → Install New Software..., add the Add... button in the dialog.

Choose a name for the update site (Scala IDE is an obvious choice). Then read the next section to select which version you will install.