Special tags support

• Support special tags (fixed directory creation, added tests): #10

Handle bad dir names

Handle bad dir names with / \ ? and * symbols.
Tests for pools.

Limiters support

Added limiters support.
Added some system tests.

Improve files.bbs handling

2.3.1

Bump version.

Filename pattern support

2.3

Filename pattern support. Use post id by default. Closes #6.

Bugfixes and redirect handling

2.2

Properly handle redirects. Use https for e621. 2.2 release.

New rewritten version

Uses both JSON/XML API.
Posts/pools work for all supported boards.