Added actions and icon to reverse engineering (import)
Added the basic structure for database import (helper and form).
Minor adjustments on ModelExportForm and DatabaseImportForm
Merge branch 'build-fix' into reveng-support2

Conflicts:
	libpgmodeler_ui/res/imagens/pgmodeler_splash_mask.png
	libpgmodeler_ui/ui/aboutform.ui
	libutils/src/globalattributes.h
	main/src/main.cpp
Merge conflict resolution when merging build-fix to reveng-support.
Merge branch 'temp' into reveng-support
Merge branch 'temp' into reveng-support
Merge branch 'temp' into reveng-support
Merge branch 'master' into reveng-support

Conflicts:
	libpgmodeler_ui/libpgmodeler_ui.pro
	libpgmodeler_ui/res/resources.qrc
	libpgmodeler_ui/ui/aboutform.ui
	libpgmodeler_ui/ui/mainwindow.ui
	libutils/src/globalattributes.h
libdbconnect renamed to libpgconnector for semantics reasons.

Added the class Catalog to handle the basis of reverse engineering by
reading the pgcatalog/information_schema.
Minor improvements on CrashHandler. Added buttons to load report and
save embedded model when in analysis mode.
Fixed the assignment of LC_COLLATE, LC_CTYPE and template db to database
instance on DatabaseWidget
Catalog class checkpoint.
Added catalog schemas for databases and roles.

Minor fixes on result set class.

Crashhandler gained a new icon.
User now can completely disabled UI stylesheets by calling executable
with param "-no-stylesheet"

Minor fix on UI stylesheet related tooltips when using Fusion theme.
Fixed library build order now libpgmodeler is built before
libpgconnector.
Catalog class implementation checkpoint.

Added catalog schema file for tablespaces and schemas.
Created the attribs_map typedef as a alias fro map<QString,QString>

Minor improvements on ResultSet class

Catalog class implementation checkpoint
Fixed analysis-mode param for CrashHandler

Catalog class implementation checkpoint
Minor improvements on SchemaParser, now its possible to make parser
ignore empty attributes.

Added catalog query for extensions