Nightly continuous integration.

[prataprc]

At present we have reached a state where there are enough unit test suite and a large source base to build momentum for this project. This is a tracking issue to figure out a nightly-continuous-integration process, targeted for Milestone-1

Steps of executions.

1. Checkout all the relevant repositories, from github, for rdms along with the latest commits.
2. Generate library artifacts, by compiling them in
   • release mode.
   • debug mode.
3. Invoke a sequence of command line programs that should typically validate the artifacts generated in step (2).
   • Each command shall return a success exit code 0, or a failure code.
   • Each command shall log messages into stdout and stderr that must by captured and saved in a file.
4. Nightly shall parse the stdout/stderr messages for warnings and error cases.
5. Finally, nigthly should be able to give a "green" or "yellow" or "red" flag, which respectively mean as "pass", "warn", "fail"
6. Additionally, Nightly shall commit the result status and stdout/stderr file into a git-repository.

Organisation of nightly-repository

    rdms-nightly/
        bin/nightly-script
        out/<yyyy>/<yyyy-mm-dd>-nightly.log
        out/<yyyy>/<yyyy-mm-dd>-nightly.status

out/<yyyy>/<yyyy-mm-dd>-nightly.log, shall contain the stdout/stderr messages from nightly script. out/<yyyy>/<yyyy-mm-dd>-nightly.status, shall contain parsed result from out/<yyyy>/<yyyy-mm-dd>-nightly.log.