Allow multiple paths and files to be specified with the --path option

[stecman]

Currently when specifying multiple paths, the last one is used:

$ beam up live -p themes -p mysite/code
...
[warn] TARGET: user@host:/home/user/public_html/mysite/code

It'd be nice to be able to specify more than one path (and possibly single files too):

$ beam up live -p themes -p mysite/code -p mysite/cache_config.yml
...
[warn] TARGET: user@host:/home/user/public_html
[warn] PATHS: themes
              mysite/code
              mysite/cache_config.yml

[stevie-mayhew]

It would also be really cool if you could specify file type(s) too.

i.e. beam down live -p assets -type jpg -type png

[stecman]

Multiple paths implemented in 3c72aed.