name the files for gt_repfind() consistently
remove the dependency on ncurses

I don't know anyone who has used this experimental feature over the years.
But the external dependency on ncurses caused a lot of pain for users and
developers, therefore I removed it completely.
That is, the previous behaviour with curses=no is now the default.
update zlib to 1.2.8
Merge pull request #103 from gordon/zlib

 update zlib to 1.2.8
define range macros for GtUword and GtWord
Merge pull request #105 from ggonnella/rangemacros

define range macros for GtUword and GtWord
dist target cannot depend on manuals anymore

for cross-compiles we have to build the manuals before
cosmetics
fix `make manuals`
allow to override strip command

for cross-compilation
add build script for different Linux ARM targets
Merge pull request #102 from gordon/curses

 remove the dependency on ncurses
Merge pull request #101 from gordon/rename

name the files for gt_repfind() consistently
fix failing gtdoc test
Merge pull request #96 from gordon/arm

build GenomeTools for different Linux ARM targets
update build_arm.sh script
remove curses=no
add cross-compile build script for darwin
extend Darwin build script for 64-bit
update darwin build script