.dispose() all the disposables

- Reloading the package (e.g. with https://github.com/cakecatz/atom-hot-package-loader) would cause all of the commands to fire N times, once for each reload
- This applies `CompositeDisposable` on all `.on*` and `.add*` calls to properly dispose all disposables and fix that leakage

lib/file-view.coffee

@@ -1,3 +1,4 @@
+{CompositeDisposable} = require 'atom'
 {$$} = require 'atom-space-pen-views'
 SymbolsView = require './symbols-view'
 
@@ -6,16 +7,16 @@ class FileView extends SymbolsView
   initialize: ->
     super
 
-    @editorsSubscription = atom.workspace.observeTextEditors (editor) =>
-      disposable = editor.onDidSave =>
+    @disposables = new CompositeDisposable()
+
+    @disposables.add atom.workspace.observeTextEditors (editor) =>
+      @disposables.add editor.onDidSave =>
         f = editor.getPath()
         return unless atom.project.contains(f)
         @ctagsCache.generateTags(f, true)
 
-      editor.onDidDestroy -> disposable.dispose()
-
   destroy: ->
-    @editorsSubscription.dispose()
+    @disposables.dispose()
     super
 
   viewForItem: ({lineNumber, name, file, pattern}) ->

lib/main.coffee

@@ -3,7 +3,7 @@ $ = null
 
 MouseEventWhichDict = {"left click": 1, "middle click": 2, "right click": 3}
 module.exports =
-  disposable: null
+  disposables: new CompositeDisposable()
 
   config:
     disableComplete:
@@ -50,26 +50,26 @@ module.exports =
     @ctagsCache.activate()
 
     @ctagsCache.initTags(atom.project.getPaths(), atom.config.get('atom-ctags.autoBuildTagsWhenActive'))
-    @disposable = atom.project.onDidChangePaths (paths)=>
+    @disposables.add atom.project.onDidChangePaths (paths)=>
       @ctagsCache.initTags(paths, atom.config.get('atom-ctags.autoBuildTagsWhenActive'))
 
-    atom.commands.add 'atom-workspace', 'atom-ctags:rebuild', (e, cmdArgs)=>
+    @disposables.add atom.commands.add 'atom-workspace', 'atom-ctags:rebuild', (e, cmdArgs)=>
       console.error "rebuild: ", e
       @ctagsCache.cmdArgs = cmdArgs if Array.isArray(cmdArgs)
       @createFileView().rebuild(true)
       if t
         clearTimeout(t)
         t = null
 
-    atom.commands.add 'atom-workspace', 'atom-ctags:toggle-project-symbols', =>
+    @disposables.add atom.commands.add 'atom-workspace', 'atom-ctags:toggle-project-symbols', =>
       @createFileView().toggleAll()
 
-    atom.commands.add 'atom-text-editor',
+    @disposables.add atom.commands.add 'atom-text-editor',
       'atom-ctags:toggle-file-symbols': => @createFileView().toggle()
       'atom-ctags:go-to-declaration': => @createFileView().goto()
       'atom-ctags:return-from-declaration': => @createGoBackView().toggle()
 
-    atom.workspace.observeTextEditors (editor) =>
+    @disposables.add atom.workspace.observeTextEditors (editor) =>
       editorView = atom.views.getView(editor)
       {$} = require 'atom-space-pen-views' unless $
       $(editorView).on 'mousedown', (event) =>
@@ -85,22 +85,19 @@ module.exports =
               atom-ctags replaces and enhances the symbols-view package.
               Therefore, symbols-view has been disabled."
 
-    atom.config.observe 'atom-ctags.disableComplete', =>
+    @disposables.add atom.config.observe 'atom-ctags.disableComplete', =>
       return unless @provider
       @provider.disabled = atom.config.get('atom-ctags.disableComplete')
 
     initExtraTagsTime = null
-    atom.config.observe 'atom-ctags.extraTagFiles', =>
+    @disposables.add atom.config.observe 'atom-ctags.extraTagFiles', =>
       clearTimeout initExtraTagsTime if initExtraTagsTime
       initExtraTagsTime = setTimeout((=>
         @ctagsCache.initExtraTags(atom.config.get('atom-ctags.extraTagFiles').split(" "))
         initExtraTagsTime = null
       ), 1000)
 
   deactivate: ->
-    if @disposable?
-      @disposable.dispose()
-      @disposable = null
 
     if @fileView?
       @fileView.destroy()
@@ -119,6 +116,7 @@ module.exports =
       @goBackView = null
 
     @ctagsCache.deactivate()
+    @disposables.dispose()
 
   createFileView: ->
     unless @fileView?