This looks related to the workaround that is documented when worknig with with web services.https://helpx.adobe.com/experience-manager/using/creating-cxf-bundles-consume-web.htmlCaused by: java.lang.ClassNotFoundException: com.sun.xml.internal.ws.spi.ProviderImplat org.apache.sling.commons.classload...

You do that like this: https://docs.adobe.com/docs/v5_1/html-resources/cq5_howto_website/ch01s12.html

Have you read all of the AEM documentation: https://docs.adobe.com/docs/en/dispatcher/page-invalidate.htmlhttps://docs.adobe.com/docs/en/dispatcher/disp-config.htmlhttps://docs.adobe.com/docs/en/dispatcher.html

I personally use vlt to sync code - never had an issue doing so. I wrote about that here: http://scottsdigitalcommunity.blogspot.ca/2015/01/creating-aem-project-using-eclipse-ide.html

Here is an older thread that discusses this: https://forums.adobe.com/thread/1061940?tstart=0

 Some developers like building a JCR node structure for each component. That is, each component has its own dialog. However - others like reusing parts of existing dialogs. See this artilce that will point you in the right direction: https://adobeaemtherightway.wordpress.com/2014/07/31/reusing-tabs-...

See this blog http://labs.6dglobal.com/blog/2016-01-07/resizing-touch-ui-component-dialogs/

Is the any documentation on Database integration with AEM? 

Here is a Stackoverflow thread http://stackoverflow.com/questions/28866912/color-picker-for-aem-component

Is there a list of Sightly documentation that shows me how to build experience manager components.