Fix bugs

Fix some translation problems

1. Fix the issue that saving project file fails occasionally.

1. Adapt to new iPhone & iPad models, e.g. iPhoneX, iPhone 11, iPhone 11 Pro, iPhone 11 max, Phone SE(2nd generation), iPad pro.
2. Fix some translation issues

1. change mBlock's name into mBlock Blockly
2.add some new blocks

1. Add languages: French, Ukrainian, Turkish, Traditional Chinese, Japanese, Dutch, Portuguese, mBlock will switch languages according to your system settings
2. New levels for mBot Ranger, up to level 10
3. Get notified for example and events

1.Optimize the Bluetooth connection
2.Adjust the display of the task
3.Fix some experience problems

1.fixed bug;
2. corrected the English translation error.

1. Add langugage support for English and German. App language will change according to your iPad's system settings
2. New levels for mBot Ranger, up to level 10
3. Get notified for examples and events

1、Fix some issues.
2、Optimize part of the levels.

1、fix bug

1.  Fixed some translation issues.

What's new in version 0.6:
1. Better course loading experience, more online courses
2. More languages: mBlock will switch languages according to your system settings.
3. Optimized underlying IDE system. More command blocks and programming-related functions added.

New features of Version 0.5.0:
1. Optimized loading mode enables users to access the current version when a network connection is not available, while updating automatically when the network connection is available.
2. Contents of the interactive courses have been updated to the 10th level, and mBot's basic instruction contents are complete.
3. User experience is further optimized by making some tweaks to visual effects and animation effects and fixing the bugs of previous version.

1. Add Creative mode, user could create project and program by themself.
2. Fixed the instruction blocks classification, add and modified all the instruction blocks.
3. Upgrade the learning stage to the story stage Mode, modified stage 1 ~ 4, added stage 5.

V0.2.0 Version Release Log:
- Improved Experiences to interactive courses, refined Level 1-4.
- Now you can connect via Bluetooth by holding your tablet near your mBot as in the Makeblock App.
- Fixed bugs and UX problems from the Alpha version.