v3.3.0 (#525)

* feat: directory-scoped cheatpaths

`cheat` now searches for a `.cheat` directory in the current working
directory. If found, that directory is (temporarily) appended to the slice
of cheatpaths.

* makefile wip

* fix: appeases linter

Appeases linter (`go vet`) by adding quotation marks to YAML struct
tags.

* chore: modifies .gitignore

Adds `tag` to `.gitignore`

* feat: adds Makefile

Adds a `Makefile` for managing build-related tasks.

* chore: documents directory-local paths

Adds documentation regarding the new directory-local cheatpath
functionality.

* chore: updates dependencies

* chore: bumps version to 3.3.0

* chore: updates bin scripts

- Removes `build_release.sh`
- Places deprecation notice in `build_devel.sh`, as its purpose has been
  superceded by the `Makefile`.

vendor/github.com/alecthomas/chroma/Makefile

@@ -0,0 +1,19 @@
+.PHONY: chromad upload all
+
+all: README.md tokentype_string.go
+
+README.md: lexers/*/*.go
+	./table.py
+
+tokentype_string.go: types.go
+	go generate
+
+chromad:
+	(cd ./cmd/chromad && go get github.com/GeertJohan/go.rice/rice@master && go install github.com/GeertJohan/go.rice/rice)
+	rm -f chromad
+	(export CGOENABLED=0 GOOS=linux ; cd ./cmd/chromad && go build -o ../../chromad .)
+	rice append -i ./cmd/chromad --exec=./chromad
+
+upload: chromad
+	scp chromad root@swapoff.org: && \
+		ssh root@swapoff.org 'install -m755 ./chromad /srv/http/swapoff.org/bin && service chromad restart'