load Oxymel via Composer
load export classes via Composer
first pass at loading and using the export API

* replace --file_item_count with --max_file_size
* --verbose is ignored, for now
add _wp_export_build_IN_condition() helper
log each exported file path

had to copy over the whole WP_Export_Split_Files_Writer class.
remove --verbose parameter

The idea is to be reasonably verbose by default and completely silent
when --quiet is passed.
Restore af65fe41c8d3b9df3c1fb1461fddf92ac165fde5, which I accidentally overwrote :(
minor whitespace fixes
add newline at end of man-src/import.txt

[ci skip]
fix indentation in import.feature

[ci skip]
Merge pull request #299 from wp-cli/import

Import Command
Added wp.bat to bin section of composer.json
support for port and socket configurations with wp core config
Make wp rewrite (flush|structure) generate .htaccess files properly for apache.
lock php-cli-tools version to 0.9.3

fixes #560; see #561
set Oxymel to version 0.1.0
merge master into export-api branch
ensure CRLF are always normalized to LF in the git database
check wp-includes/version.php before loading WP
make WP_CLI::add_command() work when called from a Composer package's autoloaded file