renamed check-ps3dev and check-psl1ght scripts to check1-ps3dev and check1-psl1ght so they get ran first
modified toolchain.sh so when the dependency scripts get executed, if a package isn't found, it will continue to check for the remaining packages before exiting.   This way, if a person is missing more than one package, they don't have to keep executing toolchain.sh.
Modified all of the dependency check scripts to allow them to continue executing if a package isn't found.  This way, if you're missing more than one package, toolchain.sh doesn't error out after the first missing package.   It will now list all of the missing packages and then exit.
Fixed a typo in toolchain-mingw.sh, however, I don't the toolchain will compile on MinGW