Use boolean args `keep` and `emrdata`
Closes issue #53 with dedicated unit test class `TestArgs`
Remove unused script: `exportForms.sh`
Improve documentation in `config-example/settings.ini`
Closes issue #63
Merge branch 'release/0.11.3' into develop
Merge pull request #77 from indera/fix-63-docu-settings

Fix issue 63 - expand documentation in "settings.ini"
Merge pull request #76 from indera/fix-53-boolean-switches

Use boolean args `keep` and `emrdata`
Correct names for two tasks in `vagrant/Makefile`
Use `EmrFileAccessDetails` object for passing new sftp params:
* sftp_server_port
* sftp_server_private_key
* sftp_server_private_key_pass
Use new `sfpt_server_*` params when connecting to sftp with a private key
Add unit test for connecting to sftp with a private key
Add dependency on `sftpserver` to `.travis.yml`
Inital work for task #9098 - `provide subject id in report`
Pass unittest with attribute `lab_id`
Improve error message `There is no subjects in the raw data`
+ Cleanup extra imports
+ No functionality changes
Reformat xml for easy reading in `test/TestCreateEmptyEventTreeForStudy.py`
Modify `create_empty_event_tree_for_study()`
to copy `lab_id` as a `person` element attribute
Remove unused file: `bin/utils/report.xsd`
Add the original subject id - `lab_id` to the summary report
TODO:
 - sort by lab_id
 - fix test/TestGenerateOutput.py
Add configuration option to allow sorting by lab_id or redcap_id
Cleanup unnecessary code in `test/TestCreateSummaryReport.py`