* 7z.dll: fixed bug: a.7z.arc was recognized as .7z archive if a.7z was stored in .arc without compresion
* GUI: runs exe/doc/xls files instead of opening them as archives (configured in Interface tab)
* GUI: ^PgUp and ^PgDn to walk in the hierarchy (in paricular to open exe/doc/... as archives)
* 7z.dll: "lt" and ArcInfo commands: shows list of solid blocks and removed .arc-specific lines
* freearc.ini: added default values for compression.zip and compression.7z options
* UI: fixed erroneous stats at the end of compression like "99,993,888 => ... bytes" on 100mb file
* LZMA: writes decompressed data in 8 mb (instead of 256 kb) chunks