[FIXED JENKINS-21013] Matrix project support for "Parameters from properties file".
[JENKINS-21013] Added tests for FileBuildParameters with MatrixProject.
[JENKINS-21013] Add helps for FileBuildParameters with MatrixProjects.
[JENKINS-21013] Don't show options for MatrixProject when used as a builder. This works perfect only with Jenkins >= 1.495.
Merge pull request #60 from ikedam/feature/JENKINS-21013_file-from-matrix-build

[JENKINS-21013] Matrix project support for "Parameters from properties file".