Work on #1005
Implements the listing of the analyers:
GET /services/rest/index/{index_name}/analyzer/
Work on #1005
Implements the RESTFul API to retrieve an analyzer:
GET /services/rest/index/web/analyzer/{analyzer_name}/lang/{lang}
Ex.: /services/rest/index/web/analyzer/TextAnalyzer/lang/FRENCH
Work on #1005
Implementation of update/creation of an analyzer
PUT services/rest/index/web/analyzer/MyAnalyzer/lang/UNDEFINED
Merge pull request #1075 from emmanuel-keller/master

Implements #1005
Merge pull request #1073 from AlexandreToyer/master

Documentation: add pages for Analyzers
Update pattern.md
Update SUMMARY.md
Mailbox crawler:
- Finalize fieldmap
- Already indexed email are no more indexed again
Implements #1077
Merge pull request #1080 from emmanuel-keller/master

Implements #1077
Documentation: add page for Docker