Implement basic support for stored functions in C/C++.

- split away struct func from struct func_def (function
object and function definition object).
- extend box.schema.func.create() to accept 'language' argument.
- move module API related cmake magic to its own file
- add test/lib to gitignore
- update to the new test-run
- add a test

ev_stat already uses inotify. Patch libev to add support for
nanosecond timestams in struct stat.

Include all neede variables to tarantool.h

#638, checking/configuring in cmake pthread_yield and sched_yield; READLINE_ROOT for better readline control;

0) DIST.LUA: Move dist.lua to tarantoolctl (+ DEB + RPM + DOCS)
0) DIST.LUA: Delete -w option
1) CMAKE: Add pod2man function for generating MAN Files from POD format
2) RPM: Add man files for tarantoolctl, move tarantoolctl+initscripts
from `tarantool` into `tarantool-common`
3) DEB: Remove tarantoolctl.1 creation
4) Remove trailing whitespaces

Fixes gh-570
Fixes gh-557

* In RPM/DEB we introduce new utility - tarantool_ctl (extra/dist/dist.lua)
* /var/pid -> /var/run
* Fix extra/dist/dist.lua
* /extra/dist/tarantool.init and /extra/dist/tarantool.service now
  are regenerated by cmake (paths to `dist.lua`)
* Systemd service (Uses sysv-init script)
* RPM Supports both systemd and init (by using '--with systemd' in
  rpmbuild flags)

This patch adds a new implementation of UUID library.
New library generates RFC4122 compatible random-based (version 4)
UUIDs using data from /dev/(u)random. The uuidgen(2) syscall is also
supported on BSD system. `struct tt_uuid` redefined from RFC4122.
Complimentary functions rewrotten to remove dependecy on e2fs libuuid.
Lua bindings refactored to use new library and support all features.

Closes #317

* Move building of modules into Lua (in rpmspec)
* Remove tarantool.cfg and init.d/tarantool_box from SCL spec (bug in cmake28-epel-6-x86_64)
* Merge two specs (for EL and other RPM linuxes)
* Add Fedora's Mock specifications

Change cmake minimum required version to 2.8.

Use copy_directory for Sophia and LuaJIT, this should
fix stupid errors when rebuilding after a pull.
Exclude src/trivia/config.h from source install.

If ${MODULE_${type}} is absolute - do not prepend with ${CMAKE_INSTALL_PREFIX}

Update mans, docs.

A lot of resources still need to be updated (build scripts, etc).

tarantool_box without arguments runs in interactive mode.
@todo:
    - log_level by default should be 'critical'
    - wal_mode by default should be 'none'
    - pid_file by default should be 'none'
    - readline should be called via coeio, to not block
    event loop while it's running

 * 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

move module related tests from test/box/ to test/module/.

Summary:
* PLUGIN_DIR -> MODULE_DIR
* MODULE_DIR prefix is /usr/lib/tarantool/VERSION
* MODULE_DIR automatically appends to both lua c/path
* removed plugin autoload facility in src/lua/init.cc
* removed admin console plugin dependencies
* moved src/box/lua/sql.lua to separate module = require('box.net.sql')
* moved src/plugin/pg = require('box.net.pg')
* moved src/plugin/mysql = require('box.net.mysql')
* default .so and .lua install is lib/tarantool/modules/{box/net/}
* debian spec and tests are updated