File system: fix SeekEnd behaviour, fix size() not being updated after write()
File system: fix SeekEnd behaviour, fix size() not being updated after write()

quertenmont/Arduino,hallard/Arduino,Cloudino/Arduino,hallard/Arduino,sticilface/Arduino,KaloNK/Arduino,CanTireInnovations/Arduino,wemos/Arduino,toastedcode/esp8266-Arduino,Lan-Hekary/Arduino,edog1973/Arduino,me-no-dev/Arduino,chrisfraser/Arduino,Cloudino/Arduino,jes/Arduino,NextDevBoard/Arduino,CanTireInnovations/Arduino,esp8266/Arduino,hallard/Arduino,NullMedia/Arduino,jes/Arduino,chrisfraser/Arduino,quertenmont/Arduino,Cloudino/Cloudino-Arduino-IDE,CanTireInnovations/Arduino,KaloNK/Arduino,Cloudino/Cloudino-Arduino-IDE,Cloudino/Cloudino-Arduino-IDE,wemos/Arduino,Cloudino/Arduino,chrisfraser/Arduino,Cloudino/Arduino,sticilface/Arduino,Adam5Wu/Arduino,Juppit/Arduino,edog1973/Arduino,lrmoreno007/Arduino,Lan-Hekary/Arduino,Lan-Hekary/Arduino,lrmoreno007/Arduino,me-no-dev/Arduino,NextDevBoard/Arduino,Juppit/Arduino,Cloudino/Cloudino-Arduino-IDE,Links2004/Arduino,Links2004/Arduino,CanTireInnovations/Arduino,Cloudino/Cloudino-Arduino-IDE,Cloudino/Arduino,edog1973/Arduino,esp8266/Arduino,gguuss/Arduino,sticilface/Arduino,lrmoreno007/Arduino,hallard/Arduino,lrmoreno007/Arduino,Cloudino/Cloudino-Arduino-IDE,toastedcode/esp8266-Arduino,CanTireInnovations/Arduino,martinayotte/ESP8266-Arduino,jes/Arduino,me-no-dev/Arduino,gguuss/Arduino,Links2004/Arduino,NullMedia/Arduino,edog1973/Arduino,martinayotte/ESP8266-Arduino,NullMedia/Arduino,Adam5Wu/Arduino,Lan-Hekary/Arduino,toastedcode/esp8266-Arduino,chrisfraser/Arduino,NullMedia/Arduino,Lan-Hekary/Arduino,gguuss/Arduino,Juppit/Arduino,lrmoreno007/Arduino,CanTireInnovations/Arduino,Juppit/Arduino,Adam5Wu/Arduino,wemos/Arduino,quertenmont/Arduino,hallard/Arduino,jes/Arduino,esp8266/Arduino,me-no-dev/Arduino,Cloudino/Arduino,toastedcode/esp8266-Arduino,esp8266/Arduino,CanTireInnovations/Arduino,edog1973/Arduino,martinayotte/ESP8266-Arduino,gguuss/Arduino,chrisfraser/Arduino,Links2004/Arduino,KaloNK/Arduino,NextDevBoard/Arduino,quertenmont/Arduino,KaloNK/Arduino,Links2004/Arduino,Cloudino/Cloudino-Arduino-IDE,me-no-dev/Arduino,wemos/Arduino,KaloNK/Arduino,esp8266/Arduino,NullMedia/Arduino,Juppit/Arduino,sticilface/Arduino,sticilface/Arduino,martinayotte/ESP8266-Arduino,Cloudino/Arduino,Adam5Wu/Arduino,gguuss/Arduino,jes/Arduino,Adam5Wu/Arduino,toastedcode/esp8266-Arduino,NextDevBoard/Arduino,NextDevBoard/Arduino,quertenmont/Arduino,wemos/Arduino,martinayotte/ESP8266-Arduino