Updated commands used to release the latest IDE.
Updated release sample script with values used for releasing 3.0.1-RC1
Added eclipse profile for building the IDE on Juno/Kepler.
Added the eclipse profile to the toolchain build.
Added building the Play plugin along with the worksheet
Modularizes building plugins, adds Scala-Search

All plugin building optional, default is just building the worksheet (as usual).
Passing a value to the branch for any plugin assumes this branch should be built.
If the branch is empty, the user iw prompted whether

Cleaned up the logic somewhat (branch existence is now tested even for non-interactive input,
plugin repos are not cloned if the plugin is not going to be built, branch asserts fail now before cloning).

This is very much still a rough cut.
Fixes after PR review:
 boolean bugs, conditional p2 merging, ifs, bash substitution
Plugin building upgrades

Removing forcible interactive behavior for plugin building
Removing obsolete Scala 2.9.x profiles
Require confirmation for plugin building under 2.11
Updated sample scipts to reflect changes plugin usage
Documenting plugin building configuration
Have an option to bypass compatibility checking
Merge pull request #8 from huitseeker/feature/play-plugin-build

Added building the Play plugin along with the worksheet
Fixes the update site URL in the SDK

Calls the tool to set the URL with the correct parameters
Fixed bad closing quote introduced by PR #8
Merge pull request #9 from skyluc/bad-update-site-for-product

Fixes the update site URL in the SDK
Updated script to be able to build master

After master has moved to Sbt 0.13.0-RC3 (see
scala-ide/scala-ide@5cd2a35963b27f9569660d17de7948122d44f2f), the uber-build
had to be updated to use Sbinary v0.4.2-SNAPSHOT.
(cherry picked from commit 764bfa09db564822d27b0db2024a825709d3763b)
Fixed regression introduced by PR #8

Using the double brackets notation for testing the value of ``$SIGN_BUILD``
doesn't work (at least on OSX).
Updated script to no longer build sbt and sbinary

Thanks to dbuild, we are no longer in need of building sbt/sbinary artifacts
ourselves, as we can consumes the ones built by dbuild.

This commit is related to https://github.com/scala-ide/scala-ide/pull/472
Added the additional profile new-sbt when building IDE

This was needed to accomodate
scala-ide/scala-ide@fa5aea7800a842a43af01b7fc14e23d554720548, and can be reverted once we
eliminate the need of the additional sbt profile.
Merge pull request #10 from dotta/build/use-dbuild-sbt-artifacts

Build/use dbuild sbt artifacts