core shell: add restx.app.package declaration in generated AppServer
core: minor: log classpath resource updated when change is detected, not on actual copy

this makes it much less verbose on full rebuild
barbary watch: FIX: false DELETE events during first detection

due to incorrect file comparison, now always use absolute path
common: coalesce file events

+ more consistent file events, always relative to initial watched dir
api-docs: allow to filter apis in api-docs by group,

with restx-admin group filtered out by default
this required to add resource group information in generated api description
admin: set group to restx-admin for admin resources
factory: FIX: SystemPropertyMachine is declared manually

can't declare automatically with @Machine in restx-factory itself, otherwise a clean build doesn't work.
fix typo
core: FIX: hot reloading was not working properly anymore

Contrary to what I think using a new classloader is not enough to get classes reloaded.
Therefore I use a HotReloadingClassloader to reload classes and a URLClassloader pointing to destination dir to reload resources.
spec: add seconds to title when recording specs

This makes it possible to records several specs per minute, very useful during presentation (and also maybe day to day use).
core shell: app run now support vm options and restx mode setting

with special care of prod mode where all classes are compiled prior to launching app
core: make prod mode not use hot/auto compile/reload by default
shell: batch mode: provide commands as arguments

use + as separator of commands
allow to do something like `restx deps install + app run`
shell: batch mode: provide commands as arguments

FIX: pass arguments to launch script
[maven-release-plugin] prepare release restx-parent-0.2.9
[maven-release-plugin] prepare for next development iteration
prepare next development version
prepare next development version
FIX: some core-shell dependencies were introduced in pom only

and lost during last generation
FIX: spec test server throws Exception on launch