dioxus create some_project now actually creates said project

[mgbvox]

This addresses issues #93 and (partially) #94.

Logic in DioxusConfig::load() was requiring the presence of a cargo crate before actually running the project creation flow; this prevented running dioxus create some_project in any arbitrary directory, and created a sub-crate inside cargo crate directories (which is, presumably, not desired behavior).

By catching the crate_root error raised in ::load() when running outside of a crate, we enable the creation of new projects from scratch, e.g.:

cd my/favorite/directory
mkdir empty
ls
# nothing!
dioxus create awesome_project
... stuff happens ...
ls
# contents: awesome_project
cd awesome_project
dioxus serve
... builds and serves as expected! 

Also added some grammar fixes.