Replace posix strdup with c standard strlen/malloc/memcpy

On MSVC the strdup implmentation differs from the posix version causing a
heap violation error when the resulting string is freed.
Remove version from README.txt

There is nothing version specific about this file, so there's no reason to include the version at the top.
Remove outdated LuaJIT 64bit check

Removed an outdated check for LuaJIT 64bit which states that a 64bit
version is not available. This is no longer true as a 64bit version of
LuaJIT is now available.
Update spanish.lua

Updating translation with latest epidemic changes and tweaked a couple of lines
Merge pull request #438 from IlDucci/patch-5

Update spanish.lua
Added a header comment with tips to the debug script
Merge pull request #322 from J-Shep/debugScriptHeaderTips
Merge pull request #434 from admdly/remove-outdated-luajit-check

Remove outdated LuaJIT 64bit check
Merge pull request #425 from TheCycoONE/readme_remove_ver

Remove version from README.txt
Merge pull request #348 from TheCycoONE/msvc_strdup_errors

Replace posix strdup with c standard strlen/malloc/memcpy