Run Travis-CI testsuite on Lua 5.1 and Lua 5.2!
prepare luarocks for lua 5.3
Merge pull request #243 from siffiejoe/lua53

prepare luarocks for lua 5.3
Use a test matrix in Travis
Add -f flag to curl, to improve error handling, as suggested in #244.
run LR itself on the Lua interpreter found during install, not on the interpreter first in the system path. Lining up with the unix shell scripts.
Merge pull request #246 from Tieske/fixed_interpreter

run LR itself on the Lua interpreter found during install (Windows)