NUCLEO_F401RE: Change system clock to 84 MHz using HSI + PLL

Update also HSE_VALUE and SPI prescaler value.
Added proper host test (draft)
Updated server IP address (According to server test script)
Add additional peripherie for ST Nucleo L152 board

Add code for . UART 3-5, SPI 2 + 3, I2C2
Merge pull request #208 from dreschpe/master

Add additional peripherie for ST Nucleo L152 board
[LPC1549] Fixed initial value of stack pointer
Merge pull request #209 from toyowata/master

[LPC1549] Fixed initial value of stack pointer
Add Intel hex utilities
[LPC1114][GCC_CR] Added export functionality
Change folder structure
[LPC11U35][GCC_CR] Added export functionality
Merge pull request #210 from dinau/lpc1114_codered_exporter

[LPC1114][GCC_CR] Added export functionality
Merge pull request #211 from dinau/lpc11u35_codered_exporter

Lpc11u35 codered exporter
Added automation tests' implementation for TCP_Server, UDP_Server and STDIO
Added proper verbose for test output
[LPC11U35][GCC_ARM][GCC_CR]: Modificatins for build.
1. Added to the export table in export_test.py.
2. Added to the build table in build_release.py
3. Added the compilation directives to RTX os files.

Notice:
 It would be better to change WORDS_STACK_SIZE definition in libraries/rtos/rtx/cmsis_os.h
 from 512 to 128 for LPC11U35 and LPC1114 micros compiled by GCC toolchain with newlib-nano,
 but I don't know the good way at this moment.
Merge pull request #212 from dinau/lpc11u35_gcc_arm

[LPC11U35][GCC_ARM][GCC_CR]: Modificatins for build.
Added implementation for TCP and UDP client
TC and UDP client updates. Added automation information to test suite. Added new peripherial: 'ethernet'
Merge branch 'master' of https://github.com/mbedmicro/mbed