simulator: build release by default, flags fixed

Don't override the build flags, append to those of the current build type
(configured via CMAKE_BUILD_TYPE).
Argo guide: changes in Introduction
Argo guide: changes in application programming guide
Argo guide: clarifications in application programming and SPM usage
c: Add test case for bug on ML605.
Merge branch 'master' of github.com:t-crest/patmos
patserdow: Make sure to show all received data immediately.
hardware: Enforce read-during-write behavior of MemBlock.
	modified:   hardware/config/default.xml
	modified:   hardware/quartus/altde2-115/patmos.qsf
	modified:   hardware/src/datacache/DataCache.scala
	modified:   hardware/src/patmos/Decode.scala
	modified:   hardware/src/patmos/Execute.scala
	modified:   hardware/src/patmos/MemBlock.scala
	modified:   hardware/src/patmos/Patmos.scala
	modified:   hardware/src/patmos/connections.scala
	modified:   hardware/src/stackcache/StackCache.scala
Revert "	modified:   hardware/config/default.xml"

This reverts commit 5a210003f4d2ac7bee7938bfff009155ebbdaf53.

	modified:   hardware/config/default.xml
	modified:   hardware/quartus/altde2-115/patmos.qsf
	modified:   hardware/src/datacache/DataCache.scala
	modified:   hardware/src/patmos/Decode.scala
	modified:   hardware/src/patmos/Execute.scala
	modified:   hardware/src/patmos/MemBlock.scala
	modified:   hardware/src/patmos/Patmos.scala
	modified:   hardware/src/patmos/connections.scala
	modified:   hardware/src/stackcache/StackCache.scala
Argo guide: minor fixes in explanation of writing a multicore application
c: Add a small test program for the NoC.
arbiter: play with test driver for synthesize results
tools: Add FPGA configuration scripts for Altera and Xilinx.
tools: Fix typo in Xilinx FPGA configuration script.
tools: Update scripts and FPGA configuration for Altera.
tools: Have patex download the FPGA configuration file if necessary.
hardware: Receive and transmit queues for UART.
hardware: Use enable signal in exception unit.
mcache: Refactor hit detection.