add -Wstrict-prototypes to SConscript for mspgcc and armgcc toolchains
adoptions to compile with -Wstrict-prototypes
Merge pull request #64 from thomaseichinger/fix_warnings

FW-183. Fix.
enabling bootloader
fixing compilation error
FW-211. Clear TX/RX UART interrupt flags when starting. Cleaned-up comments.
FW-211. periodically output 'a' over serial port in standalone UART example.
FW-211. Also build intel-standard (.hex) file for WSN430v14, which can be loaded on IoT-LAB.
FW-183. Fix warning in projects other than oos_openwsn.
FW-211. Re-order WSN430v14 projects.
FW-211. Re-order IAR projects for WSN430v13b.
FW-211. Also output intel-standard (.hex) for all WSN430v13b projects, which can be loaded on IoT-LAB.
FW-211. Fixing warnings concerning non native EOLs.
Modifying main Sconscript file for addressing FW-230 (included python sys library and allowing -Bsymbolic-functions option be appended only on Linux systems)
FW-230. Modifying main Sconscript file for allowing -Bsymbolic-functions option be appended only on Linux systems
Merge branch 'develop' of https://github.com/NicolaAccettura/openwsn-fw_FW-230 into develop
FW-230. Test commit
FW-230. Test commit
FW-230. Test again
FW-230. Allowing -Bsymbolic-functions option be added only on Linux platforms.