rudimentary preparation to build pecl exts

for now we can work with a fixed source tree path, todos

- read the tarballs from the given dir
- extract and copy each one into the php-src/ext
- check some minimal stuff for the ext, like whether it's enable/with option
- check for the lib deps (can be ommited for now)
- build with php
- pack dll and pdb to some out dir (both ext and possible deps)
- push to the ftp server
prepared more stuff in the configs
next step - can read a tgz from dir and unpack

it into the php source dir
prepared to copy the ext binaries built
moved the credentials file to the -dist one

not that it gets commited with real data somewhen
can zip the pdb/dll built
added ini for known exts
correct some wordings and load package.xml for the further usage
removed an accidential die
implemented lookup for known exts.ini
implemented dependency lookup using deplister.exe
implemented guessing with/enable config option and more checks
fixed include subdirs for extension deps
implemented named options
fixed usage of package.xml and some more
fixed error handling on ext initialization
fixed ext configure options building
make sure we exit with some non zero status on errors
implementation draft for mail with attachment
further preparations for mailing