Define SPARK in Makefile. Close #191
Update spark_wiring_time.cpp

Added timeStr with no arguments, using current time
Update spark_wiring_time.h

Added timeStr with no arguments prototype
Reduce size of TCPClient buffer
Biggest improvement in ram-optimization using newlib-nano option
Added _printf_float when using newlib-nano lib to get sprintf() working
Updated timeStr() prototype comment
uncomment code in spark_wiring_ipaddress header
Merge pull request #212 from spark/ram-optimization/tcpclient-buffer

Reduce size of TCPClient buffer
Merge pull request #207 from Iv4nS/master

Added timeStr() function without arguments to return current time string, function uses now()
Merge pull request #219 from spark/miscellaneous-updates/ipaddress-uncomment-code

uncomment code in spark_wiring_ipaddress header
Merge pull request #193 from spark/feature/define-spark

Define SPARK in Makefile
Merge pull request #222 from spark/ram-optimization/newlib-nano-option

Ram optimization/newlib nano option
#216 Allow user to control Network, WiFi and Cloud connection (WIP)
Use macro SYSTEM_MODE() before setup() and implemented remaining methods
Build products for v0.2.3
#216 Updated and Tested code
Updated Network.connecting() method
Refactoring old code by using newly added class methods
Removed deprecated class methods