vtimer: fix usage in test application
unittests: support Makefile.include in test suites

This change will pull in the `Makefile.include` for every test suite
that is compiled in.

Fixes #1205.
make: add comprehensive `buildinfo` list

Sometimes it is difficult to track down build errors for boards that you
are unfamiliar with.

This change adds `make buildinfo` that prints out all the relevant build
information for the selected board and project:

```
PROJECT: default
BOARD:   msba2
CPU:     lpc2387
MCU:     lpc2387

RIOTBASE:  /home/kijewski/RIOT/RIOT
RIOTBOARD: /home/kijewski/RIOT/RIOT/boards
RIOTCPU:   /home/kijewski/RIOT/RIOT/cpu

DEFAULT_MODULE: auto_init core cpu sys
DISABLE_MODULE:
USEMODULE:      arm_common cc110x_ng cc110x_spi config defaulttransceiver gpioint lib lpc_common ltc4150 mci net_help posix protocol_multiplex ps random rtc shell shell_commands sht11 timex transceiver uart0 vtimer

ELFFILE: /home/kijewski/RIOT/RIOT/examples/default/bin/msba2/default.elf
HEXFILE: /home/kijewski/RIOT/RIOT/examples/default/bin/msba2/default.hex

CC: arm-none-eabi-gcc
CFLAGSS:
        -DBOARD_MSBA2
        -DCPU_LPC2387
        -DMODULE_ARM_COMMON
        -DMODULE_AUTO_INIT
        -DMODULE_CC110X_NG
        -DMODULE_CC110X_SPI
        -DMODULE_CONFIG
        -DMODULE_CORE
        -DMODULE_CPU
        -DMODULE_DEFAULTTRANSCEIVER
        -DMODULE_GPIOINT
        -DMODULE_LIB
        -DMODULE_LPC_COMMON
        -DMODULE_LTC4150
        -DMODULE_MCI
        -DMODULE_NET_HELP
        -DMODULE_POSIX
        -DMODULE_PROTOCOL_MULTIPLEX
        -DMODULE_PS
        -DMODULE_RANDOM
        -DMODULE_RTC
        -DMODULE_SHELL
        -DMODULE_SHELL_COMMANDS
        -DMODULE_SHT11
        -DMODULE_SYS
        -DMODULE_TIMEX
        -DMODULE_TRANSCEIVER
        -DMODULE_UART0
        -DMODULE_VTIMER
        -O2
        -Wall
        -Wstrict-prototypes
        -mcpu=arm7tdmi-s
        -gdwarf-2
        -std=gnu99
        -fno-delete-null-pointer-checks
        -Wstrict-prototypes
        -Werror=strict-prototypes
        -Wold-style-definition
        -Werror=old-style-definition

LINK: arm-none-eabi-gcc
LINKFLAGS:
        -gdwarf-2
        -mcpu=arm7tdmi-s
        -static
        -lgcc
        -nostartfiles
        -T/home/kijewski/RIOT/RIOT/cpu/lpc2387/linkerscript.x

OBJCOPY: arm-none-eabi-objcopy
OFLAGS:  -O ihex

FLASHER: lpc2k_pgm
FFLAGS:  /dev/ttyUSB0 /home/kijewski/RIOT/RIOT/examples/default/bin/msba2/default.hex

TERMPROG: /home/kijewski/RIOT/RIOT/dist/tools/pyterm/pyterm.py
PORT:     /dev/ttyUSB0

DEBUGGER:
DEBUGGER_FLAGS:

MAKEFILE_LIST:
        /home/kijewski/RIOT/RIOT/examples/default/Makefile
        /home/kijewski/RIOT/RIOT/Makefile.include
        /home/kijewski/RIOT/RIOT/Makefile.modules
        /home/kijewski/RIOT/RIOT/Makefile.pseudomodules
        /home/kijewski/RIOT/RIOT/Makefile.defaultmodules
        /home/kijewski/RIOT/RIOT/boards/msba2/Makefile.include
        /home/kijewski/RIOT/RIOT/boards/msba2-common/Makefile.include
        /home/kijewski/RIOT/RIOT/boards/msba2-common/Makefile.dep
        /home/kijewski/RIOT/RIOT/cpu/lpc2387/Makefile.include
        /home/kijewski/RIOT/RIOT/cpu/arm_common/Makefile.include
        /home/kijewski/RIOT/RIOT/cpu/lpc_common/Makefile.include
        /home/kijewski/RIOT/RIOT/Makefile.dep
        /home/kijewski/RIOT/RIOT/Makefile.cflags
        /home/kijewski/RIOT/RIOT/sys/Makefile.include
        /home/kijewski/RIOT/RIOT/drivers/Makefile.include
        /home/kijewski/RIOT/RIOT/Makefile.buildtests
```
 make: remove clutter

Remove some outdated example code.
 make: add `BOARD_INSUFFICIENT_RAM` blacklisting

Currently most blacklistings for examples and tests are done because the
board provides too little RAM or ROM. Besides of the actual linking all
the compiling should nevertheless work just fine.

This PR adds the variable `BOARD_INSUFFICIENT_RAM` to tell the
`buildtest` to compile the code for a board, but omit the linking step.
Use `BOARD_INSUFFICIENT_RAM` in examples and tests
Merge pull request #1039 from Kijewski/buildtest-insufficient-ram

make: add `BOARD_INSUFFICIENT_RAM` blacklisting
documentation: unified descriptive text for boards
copyriot: fixed copyriot header for arm_common
cosmetics: cleaned up arm_common.h

* converted tabs to white spaces, fixed indentation, and removed SVN clutter
documentation: unified descriptive text for cpu
cosmetics: converted tabs into spaces for lpc1768 header
documentation: unified descriptive text for drivers
core: imply current_prio in `sched_switch()`

There is no need to supply the current priority to `sched_switch()`,
when this function can easily tell the value of
`active_thread->priority` itself.
Merge pull request #1152 from Kijewski/vtimer-test-warnings

vtimer: fix usage in test application
make: fix clean together with TLSF
Merge pull request #1229 from OlegHahm/description_unification

Unification of descriptive text of similar modules
Merge pull request #1230 from Kijewski/fix-clean

make: fix clean together with TLSF
Initial import of the x86 port

Currently this works only in qemu.
Merge pull request #764 from Kijewski/implement-x86

Initial x86 port: "qemu-i386"