External lua option: variables unification, propagation, export.#559

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borisfom wants to merge 3 commits intotorch:masterfrom borisfom:external_lua

+155-12

Commits on Feb 24, 2016

Added module to properly detect location of Lua libraries in case Torch is using external Lua/Rocks (like , the case of current luarocks .deb where LUA_LIBDIR is not actually pointing to Lua libs.)
borisfom
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Commits on Feb 25, 2016

Added setup of LuaRocks variables. Rectified. Cleaned up.
borisfom
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Unified Lua variables when fetched from Luarocks or via FindLua (LUA_INCDIR) etc. Lua variables are exported so Torch modules do not have to have the whole shebang of LuaRocks valuables passed to t…
borisfom
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