Correcting errors identified in recent IRC chat
Changed tee --append to tee -a
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
Change /master to /stable in several .xml files
Complexity Factor
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
plugins.xml changed mysql example
Fix a spelling error.
sophia-index: disk index based on sophia database.
Merge branch 'master' into sophia-index

Conflicts:
	src/errcode.h
sophia-index: add sophia space engine.
sophia-index: proper iterator handling and destroy, added basic test.
Force tarantool client to use bufferization for IO
engine-refactor: extend and refactor box engine interface
to support multiple engines.
Fixed sql(common, pg, mysql) search for modules

purpose: OOS-build tests fail
Fix build system to properly support pluggable modules

 * Install *.lua modules into ${DATADIR}/tarantool/1.5
    and *.so modules into ${LIBDIR}/tarantool/1.5
 * Fix default package.path and package.cpath
 * Install Lua headers to ${INCLUDE_DIR}/tarantool/1.5
 * Install config.h to ${INCLUDE_DIR}/tarantool/1.5
 * Add a new package - tarantool-dev (server development headers)
 * Use RPM Macroses in rpm.spec
 * Fix tarball generation for Debian
 * Use GNUInstallDirs.cmake to setup directories
Add patched FindPostgreSQL.cmake that just works

CMake is shipped with broken PosgreSQL script in most distros.
I had to copy this script and patch it to properly support
new versions of PostgreSQL.
Add pg and mysql dependecies to travis