Implement all build task methods.
Add pragma-ci-data submodule to idea version control.
Change data submodule to new version.
Split BuildTask to several simple modules (issue #5).
Update data submodule.
Rename ShellTaskBase to ShellTask.
Rename ShellTaskBase to ShellTask.
Fix bug, unresolved module on Linux (issue #17).
Add missing comment.
Fix bug: build is stayed in 'in progress' state.
Add build time properties definition and per-step build document saving.
Remove useless build document save actions.
Update data submodule version.
Rename TaskRunner to BuildRunner.
Rename TaskRunner to BuildRunner.
Rename BuildServer to BuildService.
Rename method BuildRunner#_startTask to _startBuild.