shredder: Removed unused lock call
file: save a tiny bit of memory
cmdline: be a bit more picky about a failed getcwd
Merge pull request #82 from SeeSpotRun/develop2

Develop2
tests: always cleanup behind, even if testcase forgot that.
cmdline: --config got missing somehow
feature: Implemented experimental -q (--clamp-low) and -Q (--clamp-top) option
astyled code
cmdline: allow any sane separator character in -T
cmdline: fix weird message when showing manpage
cmdline: Removed forgotten debug g_printerr
man: document latest changes
tests: added small -q/-Q testcase
cmdline: make -q/-Q take a factor or absolute offset
tests: make that last test prettier
cmdline: made -q/-Q accept either a factor (x.y) or a percent value (xxx%)
scons: use -Os as default compilation level
scons: split manpage generation from main SConstruct into docs/SConscript
scons: split up buildsystem fully
scons: fix xgettext target