Add structopt dependency in version 0.3.7

This patch series replaces argparse with structopt in the argument
handling code. As a first step, we need structopt as a dependency.

Import subrepo structopt/:structopt at efbdda4753592e27bc430fb01f7b9650b2f3174d
Import subrepo bitflags/:bitflags at 30668016aca6bd3b02c766e8347e0b4080d4c296
Import subrepo clap/:clap at 784524f7eb193e35f81082cc69454c8c21b948f7
Import subrepo heck/:heck at 093d56fbf001e1506e56dbfa38631d99b1066df1
Import subrepo proc-macro-error/:proc-macro-error at 6c4cfe79a622c5de8ae68557993542be46eacae2
Import subrepo proc-macro2/:proc-macro2 at d5d48eddca4566e5438e8a2cbed4a74e049544de
Import subrepo quote/:quote at 727436c6c137b20f0f34dde5d8fda2679b9747ad
Import subrepo rustversion/:rustversion at 0c5663313516263059ce9059ef81fc7a1cf655ca
Import subrepo syn-mid/:syn-mid at 5d3d85414a9e6674e1857ec22a87b96e04a6851a
Import subrepo syn/:syn at e87c27e87f6f4ef8919d0372bdb056d53ef0d8f3
Import subrepo textwrap/:textwrap at abcd618beae3f74841032aa5b53c1086b0a57ca2
Import subrepo unicode-segmentation/:unicode-segmentation at 637c9874c4fe0c205ff27787faf150a40295c6c3
Import subrepo unicode-width/:unicode-width at 3033826f8bf05e82724140a981d5941e48fce393
Import subrepo unicode-xid/:unicode-xid at 4baae9fffb156ba229665b972a9cd5991787ceb7

1 files changed, 30 insertions, 0 deletions

diff --git a/clap/examples/02_apps.rs b/clap/examples/02_apps.rs
new file mode 100644
index 0000000..8e45640
--- /dev/null
+++ b/clap/examples/02_apps.rs
@@ -0,0 +1,30 @@
+extern crate clap;
+
+use clap::App;
+
+fn main() {
+    // Apps describe the top level application
+    //
+    // You create an App and set various options on that App using the "builder pattern"
+    //
+    // The options (version(), author(), about()) aren't mandatory, but recommended. There is
+    // another option, usage(), which is an exception to the rule. This should only be used when
+    // the default usage string automatically generated by clap doesn't suffice.
+    //
+    // You also set all the valid arguments your App should accept via the arg(), args(), arg_from_usage()
+    // and args_from_usage() (as well as subcommands via the subcommand() and subcommands() methods) which
+    // will be covered later.
+    //
+    // Once all options have been set, call one of the .get_matches* family of methods in order to
+    // start the parsing and find all valid command line arguments that supplied by the user at
+    // runtime. The name given to new() will be displayed when the version or help flags are used.
+    App::new("MyApp")
+        .version("1.0")
+        .author("Kevin K. <kbknapp@gmail.com>")
+        .about("Does awesome things")
+        .get_matches();
+
+    // This example doesn't do much, but it *does* give automatic -h, --help, -V, and --version functionality ;)
+
+    // Continued program logic goes here...
+}