obsolete IMGUR as image hoster (#450)

Flex-Fuel.md

@@ -14,7 +14,7 @@ GM part numbers
 
 The Pinout is shown below
 
-![pinout](https://i.imgur.com/RGOmlZq.png)
+![pinout](Images/Flex_fuel_sensor_pinout.png)
 
 ## Sensor Setup
 
@@ -22,17 +22,17 @@ Connect your sensor to a digital input on the ECU. Then, pick the pin in TunerSt
 
 (technical details - we expect a pull-up on the ECU, about 3K, somewhere 1K to 5K)
 
-![sensor settings](https://i.imgur.com/a3NWAhn.png)
+![sensor settings](Images/Flex_fuel_sensor.png)
 
 ## Fueling Setup
 
-In `Fuel -> Injection Configuration`, configure `Stoichiometric ratio` and `E100 stoichiometric ratio`.  Unless you're doing something very weird, 14.7 and 9.0 are the correct values respectively (pure gas has a stoich ratio of 14.7:1, and pure ethanol 9.0:1).
+In `Fuel -> Injection Configuration`, configure `Stoichiometric ratio` and `E100 stoichiometric ratio`.  Unless you're doing something very weird, 14.7 and 9.0 are the correct values respectively (pure gas has a stoichiometric ratio of 14.7:1, and pure ethanol 9.0:1).
 
 That's it! The firmware will now automatically vary the fuel's stoichiometric ratio based on ethanol content.
 
 **It's recommended to switch to lambda mode (`File -> Vehicle Projects -> Project Properties -> Settings -> Lambda Display`), as the target lambda table is multiplied by the current stoichiometric ratio to get the target air/fuel ratio.**
 
-![injection settings](https://i.imgur.com/mRKFNjT.png)
+![injection settings](Images/Flex_fuel_TS_injection_settings.png)
 
 ## Ignition Timing
 

Spansion-FM4.md

@@ -11,6 +11,6 @@ UART programming:
 
 [broken link](http://learn.spansion.com/mcu_software_download?r=/EnglishDownloads/EDG/binary/zip/product/micom/tools/downloads/flash/PCWFM3.zip)
 
-![FM3/FM4 UART pins](http://i.imgur.com/vkNxRjq.png)
+![FM3/FM4 UART pins](Images/Spansion_FM4_UART_pins.png)
 
 [OpenOCD FM4 - Japanese](http://jujurou.blog34.fc2.com/blog-entry-394.html)

Tunerstudio-Connectivity.md

@@ -6,7 +6,7 @@
 
 ![Communication Settings](Images/communication_settings.png)
 
-Select the correct COM port for your rusEFI. You will usually see only two COM ports. Chances are, the one with the higher number is the rusEFI COM-port. For most cases, the selected Baud rate does not matter. 
+Select the correct COM port for your rusEFI. You will usually see only two COM ports. Chances are, the one with the higher number is the rusEFI COM-port. For most cases, the selected Baud rate does not matter.
 
 If you can't establish communication, try baud rate 38,400 | 57,600 or 115,200. If that doesn't work, you may need to try a different COM port.
 
@@ -32,7 +32,7 @@ you are expected to see a response like this:
 
 ![Expected Response](Images/response.png)
 
-Q: I try to connect with Tuner Studio and it says 
+Q: I try to connect with Tuner Studio and it says
 
 ```text
 line:532:rusEfiVersion,20140822@4388 Ford

rusEFI-Wideband-Controller.md

@@ -20,7 +20,7 @@ A: We control heater based on RPM, also WBO compensate for battery voltage based
 
 [connector info](https://rusefi.com/forum/viewtopic.php?p=43705#p43705)
 
-![connector pinout image](https://imgur.com/LvCaQ1o.jpg)
+![Bosch LSU 4.9 connector pinout](Images/Bosch_LSU_4.9_connector_pinout.png)
 
 F042 module pinout