Rename file fixes.  Prevent deleting a file by renaming it to itself.  Also confirm overwriting other files and update the session when doing so
Merge pull request #394 from TheKiteEatingTree/rename

Rename file fixes
make install
detect platform using only uname and makefile magic, no node
don't install a wrapper-wrapper shell script, just edit the provided one
don't fail the build trying to copy the (deleted) Zed.sh.tmpl
only download the right version of node-webkit
smart downloading of node-webkit
intelligently build only what's needed (still not quite done, won't see source changes)
rebuild stuff on source changes
and now no need for sudo in install
Remove copying of packages
Updated Makefiles as pointed out in #400