[FIX] Adding virtual constructor to base test class Test.

Identified by Coverity.
[FIX] Fixing various issues.

* initialization
* bracket position
[FIX] Fixes to more issues.

Found by Coverity, most are uninitialized memory problems.
[FIX] Removing some initializations again

after talking to Enrico.
[FIX] Fixing const-issue in cigar.h
Merge pull request #608 from holtgrewe/issue-fixes

Fixes to issues identified by Coverity.