consolidate duplicate ConfigureOptionsAction classes

there were two nearly identical ConfigureOptionsAction classes defined
    * src/com/limegroup/gnutella/gui/actions/ConfigureOptionsAction.java
    * src/com/limegroup/gnutella/gui/options/ConfigureOptionsAction.java

the multi-argument constructor of the former was unused
its single-argument constructor was referencd only once in:
    * src/com/limegroup/gnutella/gui/shell/ShellAssociationManager.java

the single-argument constructor of the latter was unused
its multi-argument constructor was referencd three times in:
    * src/com/frostwire/gui/library/AbstractLibraryTableMediator.java
    * src/com/frostwire/gui/library/LibraryExplorer.java
    * src/com/frostwire/gui/library/LibraryPlaylists.java
Update hr.po
Merge pull request #362 from win32re/patch-38

Update hr.po
hr.po typos
Updated jlibtorrent binaries.
Deleted eclipse file.
Update README.md

most importantly adding the preference for rebasing local commits over merging - but also filled it out a bit more with some relevant bits from the frostwire-android project README to make some points more explicit

* copied over some bits from the "coding standards" and "contribution guidelines" sections of the frostwire-android project

* removed "git pull" command from the "Getting the source" section - this followed immediatey after a "git clone" command which inherently pulls in the latest HEAD

* removed the paragraph mentioning the "eclipse.formatter.xml" file as it has apparently just been deleted from the repo

* minor cosmetic changes

regarding the windows instruction for setting environment variables in the "Build Requirements" section - (just as a note - this section was not altered) - im pretty sure that the java installer sets JAVA_HOME and adds it to the PATH automatically - CLASSPATH im not sure tho but the process is not at all similar unless one builds under something like cygwin or minGW - at least as i remember on XP setting environment variables persistently must be done via the gui "system properties"
Merge pull request #363 from bill-auger/update-readme

Update README.md
Merge pull request #361 from bill-auger/consolidate-duplicate-classes

consolidate duplicate ConfigureOptionsAction classes