Merge #321

321: Replace specs_website with just the book r=torkleyy a=torkleyy

Fixes #318

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.travis.yml

@@ -30,9 +30,19 @@ after_success: |
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
   [ $TRAVIS_RUST_VERSION = stable ] &&
-  gem install travis -v 1.8.8 --no-rdoc --no-ri &&
-  travis login --org --no-interactive --github-token ${GH_TOKEN} &&
-  travis restart --no-interactive -r slide-rs/specs-website
+  which mdbook || cargo install mdbook &&
+  cd book &&
+  mdbook build &&
+  cd .. &&
+  mkdir ../ghp &&
+  cp -r book/book/* ../ghp/ &&
+  echo "Checking out gh-pages" &&
+  git checkout --orphan gh-pages &&
+  rm -rf ./* &&
+  cp -r ../ghp/* ./ &&
+  git add -A &&
+  git commit --quiet -m "Update page" &&
+  git push -f https://${GH_TOKEN}@github.com/slide-rs/specs.git gh-pages
 
 notifications:
   webhooks:

book/src/01_intro.md

@@ -6,9 +6,14 @@ setting up, building, and structuring a game with an ECS.
 
 Specs is an ECS library that allows parallel system execution, with both low
 overhead and high flexibility, different storage types and a type-level
-system data model.
+system data model. It is mainly used for games and simulations, where it allows
+to structure code using composition over inheritance.
 
-You didn't fully understand what that sentence was about? The next section
+Additional documentation is available on `docs.rs`:
+
+* [API documentation for Specs](https://docs.rs/specs)
+
+You don't yet know what an ECS is all about? The next section
 is for you! In case you already know what an ECS is, just skip it.
 
 ## What's an ECS?