Rake tasks runner support for TeamCity 4.x

=============
1. Build
 * Copy archive with ruby sources (rakeRunnerRuby-src.zip) to "lib/dist"
 * Run "unpack rakeRunnerRuby-src.zip" task
 * Run "build_project" task

2. Deploying
 * Copy "dist/rake-runner-plugin.zip" to "[TeamCity]/webapps/ROOT/WEB-INF/plugins" folder

3. Updating bundled TeamCity libraries
 * Download dowload Teamcity 4.x libraries (Teamcity-XXXX.tar.gz)
 * Copy TeamCity-XXXX.tar.gz in lib/dist/
 * Ant task "build_project" wil automatically update bundled TC libraries

4. Sources

 |- root
 |--- [rake-runner-agent] - Agent's part of Teamcity Rake Runner, JAVA sources
 |--- [rake-runner-common] - Common code for Agent's and Server's parts or Teamcity Rake Runner, JAVA
 |--- [rake-runner-server] - Server's part of Teamcity Rake Runner, JAVA
 |--- [rake-runner-test] - Tests for rake-runner. TeamCity tests API is required for running tests
 |--- [dist] - Build artifacts
 |--- [lib/dist] - TeamCity libs for updating bundled libs and packed ruby souces for build script and RUBY part distributive
 |--- [lib/teamcity] - Bundled teamcity libraries
 |--- [lib/rakeRunnerRuby] - Unpacked RUBY part of plugin.
 |--- [out] - Compilation output directory
 |--- copyright.txt - Copyright for sources
 |--- HowToBuild.txt - this file

5. Updating rake-runner.xml

 * Open rake-runner project (rake-runner.ipr)
 * Delete JRuby facets from all modules and delet all global variables for JRuby sdks
 * IDEA->Build->Generate Ant Build:
   - "Generate single-file and build"
   - "Overwrite previously generated files"
   - Uncheck "Enable UI forms compilation" and "Use JDSK definitions from project files"
 * remove <property file="rake-runner.properties"/> line from rake-runner.xml
 * delete file rake-runner.properties
 * remove section "JDK definitions"  (including classpath properties and project.jdk.*) from rake-runner.xml
 * all invalid properties concerned to jdk
 * delete target "j2ee.build.rake-runner-serverweb" and it's usages

6. Internal Properties

  Debug loggers options:

  Use environament variables:
   * "teamcity.rake.runner.debug.output.hack.disabled" - set variable
    in "true" to disable output capturing hack that overrides operations with standard output.

   * "teamcity.rake.runner.debug.output.capturer.enabled" - set variable
    in "true" to use plugin's output capturing from rake tests instead of common TeamcCity behaviour.

   * "teamcity.rake.runner.debug.log.path" - enables logger in Ruby
     part of plugin. Value of thin variable should be path for existing diractory in which plugin will save log files

  System properties:
   * "teamcity.rake.runner.debug.mode" - set variable to enable loggin from JAVA code of agent part