0.6.0

• Increase Arduino code size from 128KB to 256KB
• Increase Arduino SRAM from 16KB to 20KB
• rename menu Featherlib (Beta) --> Featherlib (Debug)
• print warning message when Featherlib & Arduino library version are not matched
• fix get TCP peer information when SOCKET is CLOSED
• Move memory allocation for UDP from featherlib to arduino code
• change sdep parameter length from uint16_t to uint32_t
• Debug Feather
  • Retrieve Arduino Heap usage: dbgHeapTotal(), dbgHeapUsed(), dbgHeapFree()
  • Retrieve Featherlib Heap usage: dbgFeatherlibHeapTotal(), dbgFeatherlibHeapFree(), dbgFeatherlibHeapUsed()
  • add printThreadlist() and dbgThreadInfo()
• add AdafruitBase64
• add AdafruitUrlencode
• move AdafruitCrc32 to AdafruitCrypto
• AdafruitTCP : automatically free up resource when disconnected even user does not register disconnect callback
• AdafruitHTTP
  • add get() with keyvalues data support
  • move base64Decode to its own class in AdafruitCrypto
  • move urlencode to its own class
  • add response processing function
    • respParseHeader
    • respStatus
    • respContentLength
• AdafruitTwitter
  • add checkDirectMessage()
  • add setDirectMessageRecvCallback()
• SoftAP support with FeatherAP
  • add setJoinCallback(), setLeaveCallback()
  • add clientNum() clientMAC()
  • add interface properties to AdafruitTCP & AdafruitTCPServer, change constructors accordingly.
  • add interface() to return current bound interface (STATION or SoftAP)
  • add started()
  • enhance AdafruitTCP/AdafruitTCPServer to support both STA & SoftAP interface
  • enhance AdafruitUDP to support both STA & SoftAP interface
  • add APChatServer, APClientRSSI, APTcpServer examples
• AdafruitHTTPServer support
  • Static, Dynamic Page support (SimpleHTTPServer example)
  • Page resource generation with advance page design (D3Graphic example)
  • add tools/pyresource to generate C header for HTTP Server
  • support resource files in SPI Flash
• Enable SPI Flash support with AdafruitFatfs, FatFile, FatDir, FileInfo