libpoco: including an external recipe for the poco library

A previously written recipe for the poco library and
a special OpenEmbedded config file for poco is included from
https://gitorious.digitalstrom.org/dss-oe/dss-oe/blobs/raw/master/dS/meta-dss11-production/recipes-support/poco/poco_1.3.6p2.bb
and https://gitorious.digitalstrom.org/dss-oe/dss-oe/blobs/raw/master/dS/meta-dss11-production/recipes-support/poco/files/OE

This recipe and the config is redistributed here under the same
license agreement as the original.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@oss.bmw-carit.de>
libpoco: replacing our recipe by the external one
libpoco: replacing license string causing warnings by common OpenEmbedded license string
libpoco: updating to current version 1.4.6p1
libpoco: using recipe name for pcre library instead of its alias
libpoco: formatting the recipe

This commit formats the libpoco recipe to follow the common
OpenEmbedded style more closely and removes a comment that points
to warnings that do not occur with the current recipe.
libpoco: adding a patch to link correctly with pcre

The error message when compiling nodelet, which links the poco library, is:

| Linking CXX executable devel/lib/nodelet/nodelet
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/x86_64-linux/usr/bin/cmake -E cmake_link_script CMakeFiles/nodelet.dir/link.txt --verbose=1
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/x86_64-linux/usr/bin/armv5te-oe-linux-gnueabi/arm-oe-linux-gnueabi-g++    -march=armv5te -marm -mthumb-interwork  --sysroot=/home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm  -O2 -pipe -g -feliminate-unused-debug-types -fpermissive -fvisibility-inlines-hidden -fpermissive  -march=armv5te -marm -mthumb-interwork  --sysroot=/home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm  -O2 -pipe -g -feliminate-unused-debug-types -fpermissive -fvisibility-inlines-hidden -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed  -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed CMakeFiles/nodelet.dir/src/nodelet.cpp.o  -o devel/lib/nodelet/nodelet -rdynamic devel/lib/libnodeletlib.so -luuid -lbondcpp -luuid -lcpp_common -lroscpp_serialization -lrostime -lboost_date_time-mt -lboost_system-mt -lboost_thread-mt -lroscpp -lboost_signals-mt -lboost_filesystem-mt -lrosconsole -lboost_regex-mt -llog4cxx -lxmlrpcpp -ltinyxml -lclass_loader -lPocoFoundation -ldl -lconsole_bridge -lroslib -Wl,-rpath,/home/lukas/oe-core/build/tmp-eglibc/work/armv5te-oe-linux-gnueabi/nodelet/1.8.0-r0/nodelet_core-1.8.0/nodelet/build/devel/lib:
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucd_stage1'
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucd_records'
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucp_gentype'
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucd_stage2'
| collect2: error: ld returned 1 exit status
| make[2]: *** [devel/lib/nodelet/nodelet] Error 1
refering to new test reports
README: acknowledge contribution and origin of libpoco recipe
dynamic-reconfigure: adding patch to resolve path (resolving #126)

Before this commit, the following sequence of bitbake commands
failed because the path was set during compile time, and not at
runtime. After the patch from Dirk Thomas, the following sequence
now works.

bitbake nodelet-topic-tools -c cleansstate && \
bitbake dynamic-reconfigure && bitbake nodelet-topic-tools
catkin: correcting the downloadfilename that was missed before
Merge pull request #129 from bulwahn/libpoco

libpoco: new recipe based on digitalstrom's recipe (resolves #118)