Serializable RequestParams, Closes #673
Not setting Content-Type if HttpEntity was set, as it breaks eg. multipart/form-data boundaries
Added sample for behavior on igoring Content-Type when HttpEntity is set
Fixed reporting progress on InflatingEntity (wrapped compressed HttpEntity)
Code formatting
Option to provide File via RequestParams and/or SimpleMultipartEntity with different than real name
Modified FilesSample to provide use-case for custom file names via RequestParams
Prepare release of 1.4.6 version, now in SNAPSHOT mode
Merge commit 'ab297848075a3b4d05949466af71309706e8a652'