Cordova framework integration, Android support, mobile UI & options tab

Cordova integration and android platform :
- Added cordova directory with required config
- Added cordova applications generation in gulpfile
- Added cordova development instructions
- Used cordova plugins to simulate missing chrome api  plugins (chrome.serial and chrome.fileSystem)
- Added cordova clipboard support
- Added android operating system and Cordova gui mode
- Fixed some css and js files to make them working on Android as well as on computers
- Added --skipdep argument to accelerate cordova build (gulp task)
- Added a webview helper to help people to update the webview app of their device

New options tab :
- Added options tab replacing the options dropdown
- Added option to switch between phones UI and computers UI

Mobile interface and global interface improvements :
- Simplified the structure of the header with flex css
- Made headerbar and tab container responsive (compact headerbar and side menu)
- All tabs are adapted to mobile interface (except firmware flasher)
- The servos and adjustments tabs are not fully adapted but are "usable"
- Improved header bar animation
- Improved log expandation animation
- Added swipe gesture to toggle side menu

Fixes during the development :
- Logo position
- Dark mode
- Auto connection
- Error messages (cordova_chromeapi.js)
- Responsive grid
- Testing
- Disconnection
- Width of boxes inside the OSD tab
- Fixed cli tab
- OSD tab
- Motor stop switch
- White spaces in boxes
- Dialogs size
- Connect button state
- Prevent tablet with a height larger than 575px to switch to computers ui
- Fixed logging tab
- Fixed code smell
- Fixed yarn cordova plugin install issue
- Fixed content_wrapper
- Fixed vibrations when scrolling
- Fixed scrolling bar alignment
- Fixed dialogReportProblem height
- Fixed rates logo
- Fixed auto connection default value (true)
- Fixed D to D max
- Fixed dialogs

Added required messages in locales/en/messages.json file

Requested changes

src/js/Features.js

@@ -172,9 +172,10 @@ Features.prototype.generateElements = function (featuresElements) {
                     + self._features[i].name
                     + '" title="'
                     + self._features[i].name
-                    + '" type="checkbox"/></td>'
+                    + '" type="checkbox"/></td><td><div>'
                     + featureName
-                    + '<td><span i18n="feature' + self._features[i].name + '"></span>'
+                    + '</div><span class="xs" i18n="feature' + self._features[i].name + '"></span></td>'
+                    + '<td><span class="sm-min" i18n="feature' + self._features[i].name + '"></span>'
                     + feature_tip_html + '</td></tr>');
 
             var feature_e = newElement.find('input.feature');