Add LuaDist integration

[pkulchenko]

No description provided.

[pkulchenko]

@drahosp, @jayachar88, @andrewstarks, I added integration with LuaDist.

You'll need to copy the luadist package to packages/luadist.lua file and then you can run luadist commands from the local console. All luadist commands are supported, but not all of them have been extensively tested.

Usage:

• luadist.install('lpeg') -- install lpeg binary version for lua 5.1 on Windows/OSX and source version on Linux.
• luadist.remove('lpeg') -- remove lpeg module (for lua 5.1)
• luadist.install('lpeg', {source = true}) -- install lpeg source version (will likely get Lua as well)
• luadist.install('lpeg', {source = true, debug = true}) -- show all cmake commands and verbose output
• luadist.install('lpeg', {source = true, verbose = true}) -- show verbose output, but not cmake commands
• luadist.install(5.2, 'lpeg', {source = true}) -- install lpeg source version for Lua 5.2 (will likely get Lua as well)
• luadist.install('lua-5.1.5') -- install specific Lua version; you may need to remove the current one first using luadist.remove('lua-5.1.5') command.

You can also try other LuaDist commands show, info, search, tree, and so on. All commands that don't include Lua version will work with default Lua 5.1 interpreter and if you include 5.2, the commands will use 5.2 interpreter. All the modules are installed into different folders, so you can use both interpreters without conflicts.

If you get an error during installation, try running the same command with debug=true option to see what the actual cmake error is.

You can also pass CMake parameters; everything that includes uppercase letters and underscore will be handled as a CMake parameter. For example, luadist.install('lpeg', {source = true, CMAKE_FIND_FRAMEWORK = 'NEVER'})

What works:

• Windows binary installs (where available) and source installations using Lua 5.1 and Lua 5.2. Tested with cmake 2.8.10+ and mingw-tdm
• OSX source installs using Lua 5.1 and Lua 5.2 (configured to build universal binaries); you'll need CMake 2.8.10+.
• Linux source installs using Lua 5.1 and Lua 5.2 (both 32bit and 64bit)

What doesn't work:

• Windows binary install using Lua 5.2 (I get the same module as for Lua 5.1, which doesn't load).

[pkulchenko]

These changes have been merged into master (d1c49f0).