tests: add -v option for command "tests" to increase verbosity (CMake)
tests: run tests after build on Travis CI
core: add option "--yes" for add-apt-repository (Travis CI)
trigger: update comment
doc: add min version for libcpputest-dev (user's guide)
doc: update German documentation
core: download debian package libcpputest-dev from weechat.org (Travis CI)
core: add terabyte unit for size displayed
core: update German translations
core: add comments in translations for file size units
core: fix compilation warning on GNU/Hurd about unsigned long numbers
doc: fix examples of function string_format_size (plugin API reference)
core: update Japanese translations
Merge pull request #140 from l/translation_ja

core: update Japanese translations
doc: update Japanese auto-generated files
core: check that string is not NULL in function string_iconv
core: check that string is not NULL in function string_input_for_buffer
tests: add tests of function string_is_word_char
core: check that from/to arguments are not NULL in base16/64 functions
tests: add tests of functions string_iconv*