Update Indigo install instructions?

Hi,

I've tried to follow the install instructions of the README.md file in an Ubuntu 14.04 with Indigo.

I've seen that the wstool command instructions point to hydro-devel git-branches instead of indigo. Since I've thought that this should be an error, I used indigo instead and executed the wstool commands sucessfully downloading the code.

However, when executing the catkin_make I've got the following error:

  -- catkin 0.6.9
  -- BUILD_SHARED_LIBS is on
  -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  -- ~~  traversing 2 packages in topological order:
  -- ~~  - rosjava_build_tools
  -- ~~  - rosjava_core
  -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  -- +++ processing catkin package: 'rosjava_build_tools'
  -- ==> add_subdirectory(rosjava_build_tools)
  -- +++ processing catkin package: 'rosjava_core'
  -- ==> add_subdirectory(rosjava_core)
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /home/mbotuser/rosjava/build
  ####
  #### Running command: "make -j4 -l4" in "/home/mbotuser/rosjava/build"
  ####
  Scanning dependencies of target gradle-rosjava_core
  [100%] Gradling tasks for rosjava_core

  FAILURE: Build failed with an exception.

  * What went wrong:
  A problem occurred configuring root project 'rosjava_core'.
  > Could not resolve all dependencies for configuration ':classpath'.
     > Could not find any version that matches org.ros.rosjava_bootstrap:gradle_plugins:[0.2,0.3).
       Required by:
           :rosjava_core:unspecified

  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  make[2]: *** [rosjava_core/CMakeFiles/gradle-rosjava_core] Error 1
  make[1]: *** [rosjava_core/CMakeFiles/gradle-rosjava_core.dir/all] Error 2
  make: *** [all] Error 2
  Invoking "make" failed

Is it anything more that should be take into account to install it?

Thanks!

rosjava / rosjava_build_tools

Update Indigo install instructions? #22