pre-commit hook gives a warning when there are no changes files, when source files aren't where expected, and doesn't exit.
Problem 1:
```
Traceback (most recent call last):
File "scripts/maint/lintChanges.py", line 111, in <module>
if lintfile(fname):
File "scripts/maint/lintChanges.py", line 53, in lintfile
with open(fname) as f:
IOError: [Errno 2] No such file or directory: './changes/*'
On branch release-0.3.5
Your branch is up to date with 'origin/release-0.3.5'.
```
Problem 2: The script lets me commit anyway.
Problem 3: It doesn't run checkSpace.pl on the right locations for our pre-0.3.5 source layout.
issue