Adding targets to XCode project.

Have working targets for kenlm binaries
and for libmoses, with the caveat that
only source files from the lm, moses, and util dirs
are currently included in libmoses.

The next step is adding the other relevant dirs
to libmoses.
In XCode, removed headers from libmoses target.
XCode project can now compile CreateOnDiskPt

If libmoses.a was compiled with LM_IRST,
then the following flags must be passed to the linker
when compiling CreateOnDiskPt:
-L $(XCODE_MOSES_LIBRARY_IRSTLM)
-lirstlm

If libmoses.a was compiled with LM_SRI,
then the following flags must be passed to the linker
when compiling CreateOnDiskPt:
-L $(XCODE_MOSES_LIBRARY_SRILM)
-ldstruct
-liconv
-lz
-lmisc
-loolm

Additionally, if libmoses.a was compiled with LM_SRI,
and SRILM was compiled with lbfgs,
then the following flags must be passed to the linker
when compiling CreateOnDiskPt:
-L $(XCODE_MOSES_LIBRARY_LBFGS)
-Xlinker -search_paths_first
-llbfgs

An note of explanation here may be warranted
with regard to the above lbfgs-related flags:
Mac OS X ships with a dynamic library that is loaded
with the flag -lz. SRILM compiles its own version of this
library. If SRILM is compiled statically, this becomes a problem.
We need XCode to link against the SRILM version of zlib,
but by default, the linker will search through all known library paths
for a dynamic version first. Only if no dynamic version is found will
it then search the library paths for a static version.
The fix for this problem is to use the -Xlinker flag to pass an additional
flag to the linker: -search_paths_first. This flag forces to linker to
iterate only once through each directory in its library path; within each
such directory it will first look for a dynamic version and
then, if necessary, for a static version. This solves the problem.
XCode can now compile queryOnDiskPt

Also fixed some inconsistencies between
debug and release for some targets.
XCode can now compile moses and lmbrgrid
XCode can now compile moses_chart
XCode can now compile biconcor
Adding more executables to XCode project
Merge branch 'master' of www:/repos/git/Decoders/mosesdecoder
Checking in examples of CMake files.

The example in contrib works, as does the one in biconcor.

The examples in lm and moses don't work at the moment,
but checking them in anyway as a starting point
for any potential work on them next week during the
MT Marathon.
Merge branch 'master' of www:/repos/git/Decoders/mosesdecoder