Sync rfc 89 & 94 from master
completed RFC 93
added missing sections
Merge pull request #52 from fdesj/rfc-93

completed RFC 93
completed examples sections
Merge pull request #53 from fdesj/rfc-93

completed examples sections
update for 6.4 beta1 release
remove some unusefull commits from changelog
initial commit for rfc-102..
Initial RFC 102: Support of Styleitem JavaScript Plugin
Fixed regular expression documentation mixup (#54)
Removed the deprecated validation.txt file from mapfile (contents moved to cgi/runsub some time ago).  Added another note on the mandatory use of validation blocks from 6.0 in the run-time substitution document
update for 6.4-beta2 release
Add more complete introduction
add warnings, mostly about the CGI commands/substitutions/wrappers

- don't use shell wrappers
- CGI commands and runsubs are not available for mapscript
- antialias document is irrelevant for mapserver >= 6.0
Add RFC103: Layer Level Encoding Handling
added utfgrid documentation
completed RFC 93
small edit
removed type