Delete TEE from Client(We can emulate it's behaviour with standart linux 'tee' utility)
Add pager functionality
Add support for environmental variables
Add support of pager for dostring and not run exit dostring
Add support of 'PAGER' env variable and remove mem leak
Merge branch 'gh-59-pager' into stable
Merge branch 'stable'

Conflicts:
	client/tarantool/CMakeLists.txt
	client/tarantool/tc.c
	client/tarantool/tc_cli.c
	client/tarantool/tc_print.c