Add install script to symlink pear to usr/local/bin

[salarkhan]

So, interesting problem here.

If I symlink the git-pear folder to bin, I can't use it anywhere. Except for inside bin. And only as git-pear/pear. So, that's weird.

If I symlink pear, I get the following

Couple questions:

• How can we bring the whole folder into bin, and yet still be able to call pear? Do we have to copy the pear executable and the rest of the directory separately into bin?
• Why symlink and not a hard link? If they delete the git-pear folder after they run pear install, won't the symlink be dead?

[salarkhan]

Possible answer? http://superuser.com/questions/749750/how-to-maintain-parent-path-of-symlinked-folder

[salarkhan]

Ok readlink is legit.

[salarkhan]

Oh, and fixes 1/2 of Myles' suggestions in #28

[salarkhan]

Also fixes #15