travis: use variable for apt's base URL
travis: fix a typo
travis: install groonga
travis: use Cutter setup script
test function: show table contents for debug on Travis
Fix possible reusing uncleared segments
test: ignore temporary directory
doc: use setup script for Travis
doc: fix a typo
Merge pull request #25 from groonga/support-selector

Support custom selector definition
Fix missing initialization of a pointer
clearlock: use meanigful variable name
clearlock: show not found target name
travis: show package version
clearlock: fix backward incompatibility

A database that is create by groonga <= 2.0.3 has "add" command in
database but "add" command doesn't load by default since groonga >=
2.0.4. So "object not found" error is occurred by traversing all
objects in the old database. But it can be ignored because it's not
desired backward incompatibility.
travis: support master use
travis: indent
Fix PCRE's -L flags aren't detected
groonga-httpd: use --with-cc-opt and --with-ld-opt
Move get command to table plugin