* Core 2.6.0+ fixes
* fix env -> config, run travis04 job
* don't duplicate free heap in frag data, use single stats struct
* fix dtostrf warnings, bump buffer sizes
* ...and even less words for fragmentation stat
* initial ldscripts refactoring
* add missing menu options
* board for 2.3.0 and 2.4.2
* test with core 2.5.0
* typo
* ...same typo in other boards.local.txt
* generate boards.local.txt from common template
* Depend on file presence instead of platform version
* sdk selection
* Override only relevant entries
* generate ldscripts
* formatting
* unused
* fix section scope
* fix linker script comment and build getting stuck
* py2 compat
platformio from pip still does not support py3
* add TODO for py3
* chmod +x, remove leading newline
* comment with real spiffs size
* fixup! chmod +x, remove leading newline
* regenerate all ldscripts
* Preventive fix of spiffs_end calculation
* update arg parsing
* generate only 2.3.0 and latest
* readme for boards.local.txt
* Update ldscript readme
* unique flash sizes
* fix sub
* line break
* correct way to get framework path
* Alias for _FS_... symbols
* unused 2m1m1s
* bump?
* show travis logs
* ensure latest toolchain for travis
* check platform packages when building
