fixed little numerical instability in dielectric pore and added

external field to iccp3m again
Merge branch 'master' of git://github.com/espressomd/espresso
added out radius for pore constraint an lbboundary

Conflicts:

	src/tcl/lb-boundaries_tcl.c
Merge branch 'master' into work_branch
Merge remote-tracking branch 'stefan/master' into work_branch
Merge branch 'master' into work_branch
to ensure that the work_branch is up to date
First attempt at three point coupling, runs but doesn't give correct results.
three point coupling scheme appears to work, documented, still needs to be properly integrated into the lb test case
fixed bug in three point couple, fixed test suite addition, lots of code duplication
small fix of test case for Shan Chen to pass test
final touches on three point coupling, changed a variable name to avoid namespace conflict with global my_left
Removed horrible memleak from p3m_gpu.
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Changed p3m_gpu block-size issue.
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Reset influence function calculation to CPU mode.
Merge branch 'master' of ssh.icp.uni-stuttgart.de:/home/fweik/Source/espresso-clean
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