cmake: support LZ4
cmake: add GRN_DEFAULT_ENCODING configuration
cmake: add GRN_DEFAULT_DB_KEY configuration

Normally, it's not used.
cmake: add missing GRN_CONFIG_PATH variable
packages fedora: add missing so extension for installing plugin library
doc table_create: add token_filters
doc reference: add token filters
Merge pull request #226 from cosmo0920/add-missing-ext-plugin-lib

packages fedora: add missing so extension for installing plugin library

Patch by Hiroshi Hatake. Thanks!!!
Merge pull request #227 from naoa/doc-add-token-filters

doc add token filters

Patch by Naoya Murakami. Thanks!!!
doc: remove a trailing space
doc: add a missing empty line
doc: remove a trailing space
doc: split "stopword"

    stopword  ->
    stop word
        +

Because WikiPedia has "Stop words" page.
doc: fix stop word column name
doc: fix English
doc: fix English
doc: add description what is explained by example
doc token filters: link to token_filters option
doc token filter ja: update translation
snippet_html: support compressed column