Small improvements

1. Add 'html_compress_exclude_pattern' config var
2. Compression can be disabled per configuration 'html_compress: false'

Thanks @dkrnl and @shdev

v2.0.3

Exclude from minify *.mp4 files (thanks @loopion)

v2.0.2

What's new in this release ?:

• exclude from minify/compress process some media files like: jpeg, png, gif, ico, svg, psd, tiff, webm, mov, avi, mkv
• add configurable option "html_compress_exclude" to exclude some files from minify process

v2.0.1

Initial version for Spress 2.x.