Temporarily disabled SQLite3 test case test6

Waiting for resolution of the issue #15 which may lead to changes in public interface behaviour. See the issue comments and the discussion thread on soci-users.
cmake: FindSQLite3 - add handling of SQLITE_ROOT_DIR
Fix not setting INSTALL_NAME_DIR
Merge pull request #30 from arsenm/master

Set INSTALL_NAME_DIR as used on OS X
backends/oracle: support working in multithreaded programs

OCI_THREADED ensures that shared OCI data is properly protected.

OCI_ENV_NO_MUTEX avoids using mutexes when there are no concurrent
accesses to a session, which is the multithreading model that SOCI
employs.

More details:
http://docs.oracle.com/cd/B10501_01/appdev.920/a96584/oci15re4.htm
Merge pull request #31 from avg-I/oracle/multithreading

backends/oracle: support working in multithreaded programs
updated searched names to handle sqlite from GIS/OSGeo environment
Merge pull request #29 from snikulov/find_sqlite_update

cmake: FindSQLite3 - add handling of SQLITE_ROOT_DIR
Update .travis.yml

Removed mloskot's secondary e-mail
Merge pull request #34 from mloskot/master

README update and minimal CMake version update
FindODBC.cmake: rename ODBC_INCLUDE_DIRECTORIES to ODBC_INCLUDE_DIR

This matches the convention used by all other FindXXX modules and is
compatible with soci_backend() macro.
Merge pull request #35 from avg-I/odbc/cmake

FindODBC.cmake: rename ODBC_INCLUDE_DIRECTORIES to ODBC_INCLUDE_DIR
qualify strtoull/strtoll with std namespace

The included header is cstdlib, not stdlib.h, so global/C versions
can be visible only as a side effect, but it is better to use
proper versions in std::.

This caused a problem at least on FreeBSD.
Merge pull request #37 from avg-I/os/freebsd

qualify strtoull/strtoll with std namespace