Upgrade to Tika 2.0

This release includes a significant refactoring from the 1.x branch including modularization of the parsers modules, the new pipes modules and numerous bug fixes and dependency upgrades.

The parser modules have been broken into three main modules:
        tika-parsers-standard, tika-parsers-extended and tika-parsers-ml.
        Users may now need to add tika-parsers-extended's
        tika-parser-scientific-module or tika-parser-sqlite3-module to tika-app and
        tika-server to include parsers that used to be included by default
        (for example: envi, gdal, grib, isatab, netcdf, sqlite3).