Proposed, and implemented, some enhancements (1Mb + 1Mb firmware, resizable jsvars size, ...)

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•

MaBe

@Pedro can you please briefly explain how to switch to "flashMap": "4MB:1024/1024"

•

Pedro in reply to @MaBe
In the Makefile:

ESP_FLASH_SIZE ?= 6
ET_FS ?= 32m-c1

And in user_main.c, change (to avoid a warning):
```
if ((chip == 0x4013 && map != 0) || (chip == 0x4016 && map != 4)) {
```
to
```
if ((chip == 0x4013 && map != 0) || (chip == 0x4016 && map != 4 && map != 6)) {
```
As soon as I have created the branch I will submit the changes for review (including this in the makefile with the proper conditionals)

In this mode, user1 and user2 bin files are identical (no different ld files) and the bootloader maps the first or second MB of flash to 0x40200000. As commented before, I need to check in the existing code that there is nothing hardcoded in current espruino build for ESP8266 when referencing flash from the first or second image

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