Merge pull request #556 from thomasvandoren/fix-chpl-version

Propagate --version fix to release/1.10 branch.
Change quote escaping in testReleaseHelp to support older versions of csh.
Update version.cpp to correctly check for default BUILD_VERSION.

I went back and forth on whether the default for BUILD_VERSION should be empty
string or string with 0 in it. Ultimately, the latter was chosen, but I forgot
to update the strcmp in version.cpp. That is now fixed.
Merge pull request #567 from thomasvandoren/fix-test-release-base-1.10

Fix test release script.

Last night's run of testRelease failed with the error message:

```
Unmatched ".
Error running testReleaseHelp script: 1
```

Update the testReleaseHelper script to escape quotes and variables in a way that supports older
versions of tcsh, like the one used by the automated test system. As a bonus, fix the `--version`
output when CHPL_DEVELOPER is not set. (I forgot to update the default value in version.cpp
in #550 to be "0" instead of empty string.)