fix bug in OTSymmetricKey.cpp
Merge pull request #151 from da2ce7/changepw_fix

fix bug in OTSymmetricKey.cpp when useing changepw command
build_tar.sh: re-fix version fetching from git tag
Merge pull request #152 from toxeus/fixDescribe

build_tar.sh: re-fix version fetching from git tag
Fix .deb installation.

Tested on Ubuntu 14.04.
Probably the most trivial commit ever.
Merge pull request #153 from haarts/develop

Fix .deb installation
Comments cleanup.
Removed mock.
Removed commented out function.
Moved default ctor last without definition.
Removed commented out function.
Moved member variables last.
Moved private members last.
Remove dead code.
Moved private header into src.
Moved function into anonymous namespace in source file.
No virtual needed and improved release of memory.
Moved member variables last.
Changed public member variables to private, removed unused functions or made others private.