Better travis

[joneshf]

@garyb can you review? If what I said in #6 makes sense, I'd like to go this way. If not, let me know.

[garyb]

Looks good to me, but apparently travis doesn't like it:

...
0.23s$ tar zxvf $HOME/purescript.tar.gz -C /usr/local/bin purescript/psc{,i,-docs,-make} --strip-components=1

purescript/psc-docs

tar: psc-docs: Cannot open: Permission denied

purescript/psc-make

tar: psc-make: Cannot open: Permission denied

purescript/psci

tar: psci: Cannot open: Permission denied

purescript/psc

tar: psc: Cannot open: Permission denied

tar: Exiting with failure status due to previous errors

The command "tar zxvf $HOME/purescript.tar.gz -C /usr/local/bin purescript/psc{,i,-docs,-make} --strip-components=1" failed and exited with 2 during .

Your build has been stopped.

[garyb]

Ah, I think this is why $PATH was extended to include a directory in $HOME for the executables rather than installing them in /usr/local/bin

[joneshf]

Oh, right.

[joneshf]

Okay, I'm going to merge this and close #6, the history should stay the same though.

[joneshf]

Oh I guess it auto merges it, neat!