Implement glob ignores (#272)

* Add Glob wrapper type with better serialization

* Introduce PathIgnoreRule struct

* Implement equality for Glob type

* Add PathIgnoreRule to InstanceContext

* Implement glob ignores in directory middleware

* Fix up filters

* Use Iterator::all instead of loop

* Add project-level configuration for glob ignores

* Add test project for glob ignores

* Wire up project file and snapshots to make glob ignores work

* Better codepaths for adding ignore rules with empty iterators

* Add test for globs inherited from parent projects

* Add test details, support glob ignores in nested projects

* Add feature flag for globs

* Switch to use ExactSizeIterator instead of size_hint

* Remove glob visitor

Cargo.toml

@@ -18,6 +18,9 @@ exclude = [
 [features]
 default = []
 
+# Turn on support for specifying glob ignore path rules in the project format.
+unstable_glob_ignore_paths = []
+
 # Turn on the server half of Rojo's unstable two-way sync feature.
 unstable_two_way_sync = []
 
@@ -54,6 +57,7 @@ crossbeam-channel = "0.4.0"
 csv = "1.1.1"
 env_logger = "0.7.1"
 futures = "0.1.29"
+globset = "0.4.4"
 humantime = "1.3.0"
 hyper = "0.12.35"
 jod-thread = "0.1.0"
@@ -69,7 +73,7 @@ regex = "1.3.1"
 reqwest = "0.9.20"
 ritz = "0.1.0"
 rlua = "0.17.0"
-serde = { version = "1.0", features = ["derive"] }
+serde = { version = "1.0", features = ["derive", "rc"] }
 serde_json = "1.0"
 snafu = "0.6.0"
 structopt = "0.3.5"